Download Physics Final Exam Problems

Final Exam Review (Hewitt Tests)
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Chapter 2 – Linear Motion
1. True/False The rate at which velocity changes with time is called acceleration.
2. True/False The SI unit of acceleration is meters per second.
3. True/False When a car rounds a corner at a constant speed, its acceleration is zero.
4. True/False A ball is thrown in the air. At the highest point, the ball has a zero velocity and zero acceleration.
5. True/False As a ball falls freely, the distance it falls each second is the same.
6. Speed is
a. A measure of how fast something is moving
b. The distance covered per unit time.
c. Always measured in terms of a unit of distance divided by a unit of time.
d. All of the above
7. One possible unit of speed is
a. Miles per hour
b. Kilometers per hour
c. Light years per century
d. All of the above
8. When you look at the speedometer in a moving car, you can see the car’s
a. Instantaneous speed
b. Average speed
c. Instantaneous acceleration
d. Average acceleration
e. Average distance traveled
9. Suppose you take a trip that covers 240 km and takes 4 hours. Your average speed is
a. 480 km/h
b. 240 km/h
c. 120 km/h
d. 60 km/h
10. Acceleration is defined as the CHANGE in
a. Position divided by the time interval
b. Velocity divided by the time interval
c. Time it takes to move from one speed to another speed
d. Time it takes to move from one place to another place
11. Suppose you are in a car that is going around a curve. The speedometer reads a constant 30 miles per hour. Which of
the following is NOT true?
a. You and the car are accelerating
b. Your speed is constant
c. Your velocity is constant
d. Your acceleration is constant
12. Suppose a car is moving in a straight line and steadily increases its speed. It moves from 35 km/f to 40 km/h the first
second and from 40 km/h to 45 km/h the next second. What is the car’s acceleration?
a. 5 km/h/s
b. 10 km/h/s
c. 35 km/h/s
d. 40 km/h/s
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13. A ball is thrown straight up. At the top of its path its acceleration is
a. 0 m/s/s
b. About 5 m/s/s
c. About 10 m/s/s
d. About 20 m/s/s
14. What is the average speed of a cheetah that runs 70 m in 2.5 seconds?
15. An apple falls from a tree and one-half second later hits the ground. How fast is it falling when it hits the ground?
Chapter 3 – Projectile Motion
1. True/False A quantity that has both magnitude and direction is called a scalar.
2. True/False A single vector can be replaced by two vectors in the X and Y directions. These X and Y vectors are
called the resultant of the original vector.
3. True/False Wind velocity can be represented as a vector quantity.
4. True/False The vertical component of velocity for a projectile varies with time, even with no air resistance.
5. True/False The horizontal component of velocity for a projectile varies with time, even with no air resistance.
6. A vector is a quantity that has
a. Magnitude and time
b. Magnitude and direction
c. Time and direction
7. When velocity is represented as a vector
a. The length of the arrow represents the speed
b. The length of the arrow is drawn to a suitable scale
c. The direction of the arrow shows the direction of motion
d. All of the above
8. What is the minimum resultant possible when adding a 3-unit vector to an 8-unit vector?
a. 24
b. 11
c. 8
d. 5
9. What is the maximum resultant possible when adding a 3-unit vector to an 8-unit vector?
a. 24
b. 11
c. 8
d. 5
10. An airplane flying into a head wind loses ground speed, and an airplane flying with the wind gains ground speed. If an
airplane flies at right angles to the wind, then ground speed is
a. Less
b. Unchanged
c. More
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11. Which of the following would NOT be considered a projectile?
a. A cannonball thrown through the air
b. A cannonball rolling down a slope
c. A cannonball thrown straight up
d. A cannonball rolling off the edge of a table
12. The horizontal component of a projectile’s velocity is independent of
a. The vertical component of its velocity
b. The range of the projectile
c. Time
13. A ball is thrown into the air at some angle between 10 degrees and 90 degrees. At the very top of the ball’s path, its
velocity is
a. Entirely vertical
b. Entirely horizontal
c. Both vertical and horizontal
d. There’s not enough information given to determine
Chapter 4 – Newton’s First Law of Motion – Inertia
1. True/False The amount of matter in an object is called its weight.
2. True/False The SI unit of force is called the kilogram.
3. True/False If a hockey puck slides on a perfectly frictionless surface, it will eventually slow down because of its
inertia.
4. True/False Inertia is the reluctance any material object has to change in its state of motion.
5. True/False The combination of all the forces that act on an object is called the net force.
6. Whirl a rock at the end of a string and it follows a circular path. If the string breaks, the tendency of the rock is to
a. Follow a spiral path
b. Continue to follow a circular path
c. Follow a straight-line path
7. Galileo found that a ball rolling down one inclined plane would roll how far up another inclined plane?
a. To nearly twice the height as where it originally started
b. To nearly the same height as where it originally started
c. To nearly half its original height
d. To about one quarter its original height
8. The law of inertia states that an object
a. At rest will remain at rest unless acted on by an outside force
b. Will continue moving at the same velocity unless an outside force acts on it
c. Will continue moving in a straight line unless an outside force acts on it
d. All of the above
9. The law of inertia applies to
a. Moving objects
b. Objects at rest
c. Both moving and nonmoving objects
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10. After a cannonball is fired into frictionless space, the amount of force needed to keep it going equals
a. Twice the force with which it was fired
b. The same amount of force with which it was fired.
c. One half the force with which it was fired
d. Zero, since no force is necessary to keep it moving
11. Which has more mass, a kilogram of feathers or a kilogram of iron?
a. The feathers
b. The iron
c. Neither. The masses are equal
12. A 10-N force and a 30-N force act on an object in opposite directions. What is the net force on the object?
a. 40 N
b. 30 N
c. 20 N
d. 10 N
13. On the surface of Jupiter the acceleration due to gravity is about 3 times that on earth. How much would a 100 kg rock
weigh on Jupiter?
14. List three differences between mass and weight.
Chapter 5 – Newton’s Second Law of Motion – Force and Acceleration
1. True/False Objects move only when a force is exerted.
2. True/False The acceleration of an object is inversely proportional to the net force acting on it.
3. True/False The speed of an object dropped in the air will continue to increase without limit until it strikes the ground.
4. The acceleration produced by a net force on an object is
a. Directly proportional to the magnitude of the net force.
b. In the same direction as the net force.
c. Inversely proportional to the mass of the object
d. All of the above
5. If the force acting on a cart doubles, what happens to the cart’s acceleration?
a. It quadruples
b. It doubles
c. It halves
d. It quarters
6. A tennis ball and a solid steel ball the same size are dropped at the same time. Which ball has the greater force acting
on it?
a. The tennis ball
b. The steel ball
c. They both have the same force acting on them.
7. A tennis ball and a solid steel ball the same size are dropped at the same time. In the absence of air resistance, which
ball has the greater acceleration?
a. The tennis ball
b. The steel ball
c. Nonsense! They both the same acceleration
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8. As he falls from a high-flying stationary helicopter, Bronco’s velocity increases and his acceleration
a. Decreases
b. Remains the same
c. Increases
9. You push with 30 N on a 3-kg block and there are no opposing forces. What is the block’s acceleration?
10. A 50-kg block of cement is pulled upward (not sideways) with a force of 600 N. What is its acceleration?
Chapter 6 – Newton’s Third Law of Motion – Action and Reaction
1. True/False Whenever one object exerts a force on a second object, the second object always exerts the same amount
of force back on the first object.
2. True/False A rocket is pushed forward by gases that are forced out the back of the ship.
3. True/False In order to make a cart move forward, a horse must pull harder on the cart than the cart pulls on the horse.
4. True/False If a bicycle and a parked car have a head-on collision, the force of impact is greater on the bicycle.
5. True/False The earth and moon pull on each other with equal amounts of force.
6. Whenever an object exerts a force on another object, the second object exerts a force of the same magnitude, but in
the opposite direction to that of the first object.
a. Always true
b. Sometimes true
c. Always false
7. A high school student hits a nail with a hammer. During the collision, there is a force
a. On the hammer but not on the nail.
b. On the nail but not on the hammer
c. On the nail and also on the hammer
8. A woman weighing 500 N sits on the floor. She exerts a force on the floor of
a. 1000 N
b. 500 N
c. 250 N
d. 50 N
9. As a 500 N woman sits of the floor, the floor exerts a force on her of
a. 1000 N
b. 500 N
c. 250 N
d. 50 N
10. Forces always occur
a. When velocities are constant
b. As single quantities
c. In pairs
d. In triplets
11. An unfortunate bug splatters against the windshield of a moving car. Compared to the force of the car on the bug, the
amount of force of the bug on the car is
a. Larger
b. Smaller
c. The same
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12. An unfortunate bug spatters against the windshield of a moving car. Compared to the deceleration of the car, the
deceleration of the bug is
a. Larger
b. Smaller
c. The same
13. If a horse pulls on a wagon at rest, the wagon pulls back equally as much on the horse. Will the wagon be set into
motion?
a. No, because the forces cancel each other out.
b. Yes, because there is a net force acting on the wagon
c. Yes, because there is a time delay between action and reaction
d. Yes, because the horse’s pull on the wagon is larger than the wagon’s pull on the horse.
14. A 60-kg person on in-line skates pushes against a wall with a force of 30 N and recoils. What acceleration does that
person experience?
15. Apply Newton’s third law to a falling boulder. Identify the action and reaction forces.
a. If a force is exerted on the earth, why doesn’t it move?
Chapter 7 – Momentum
1. True/False If the net external force acting on a system is zero, then the total momentum of the system is zero.
2. True/False Impulses are smaller when bouncing takes place.
3. True/False After a firecracker falling through the air explodes, the net momentum of its fragments decreases.
4. True/False The padding on car dashboards lengthens the time of a passenger’s impact during a collision.
5. True/False If a net force acts on a system, the system’s momentum will change.
6. Which has more momentum, a large truck moving at 30 mph or a small truck moving at 30 mph?
a. The large truck
b. The small truck
c. Both have the same momentum
7. Compared to a sports car moving at 30 mph, the same sports car moving at 60 mph has
a. The same momentum
b. Twice as much momentum
c. Four times as much momentum
8. If the momentum of an object changes and its mass remains constant
a. Its velocity is changing
b. It is accelerating (or decelerating)
c. There is a force acting on it
d. All of the above
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9. The momentum change of an object is equal to the
a. Force acting on it
b. Velocity change of the object
c. Impulse acting on it
d. Object’s mass time the force acting on it
10. If Superman at rest in free space throws an asteroid that has more mass than he does, which moves faster?
a. The asteroid
b. Superman
c. They both move at the same speed
11. Skelly the skater traveling at a high speed needs a certain amount of force to stop him. More stopping force will be
needed if he has
a. More mass
b. More momentum
c. Less time to stop
d. All of these
12. A ping pong ball gun is fired. Compared to the impulse on the ball, the amount of impulse of the gun is
a. Larger
b. Smaller
c. The same
13. The cannonball shot from a cannon with a long barrel will be faster than a cannonball shot from a cannon with a short
barrel because the it receives a greater
a. Force
b. Impulse
c. Both of these
d. Neither of these
14. What is the average momentum of a 70-kg runner who covers 400 m is 50 s?
15. A 30-kg girl and a 25-kg boy face each other on friction-free roller skates. The girl pushes the boy, who moves away
at a speed of 1 m/s. What is the girl’s speed?
16. A railroad diesel engine coasting at 10 km/h runs into a stationary flatcar. The diesel weighs 4 times as much as the
flatcar. Assuming the cars couple together, how fast are they moving after the collision?
Chapter 8 – Energy
1. True/False The rate at which work is done is called power.
2. True/False The energy an object has by virtue of its location is called its potential energy.
3. True/False The energy an object has by virtue of its motion is called its kinetic energy.
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4. True/False More power is needed to carry a heavy suitcase slowly up a flight of stairs than to carry the suitcase
quickly up the same flight of stairs.
5. If you lift one load up two stories, how much work do you do compared to lifting one load up only one story?
a. Four times as much
b. Twice as much
c. The same amount
d. One half as much
6. If Nellie Newton pushes an object with twice the force for twice the distance, she does
a. The same work
b. Twice the work
c. Four times the work
d. Eight times the work
7. How much work is done on a 50-N rock that you lift 10 m straight up?
a. 500 J
b. 50 J
c. 10 J
d. 1 J
8. How much power is expended if you lift a 50-N rock 10 meters in 1 second?
a. 500 W
b. 50 W
c. 10 W
d. 5 W
9. An object that has kinetic energy must be
a. Moving
b. Falling
c. Elevated
d. At rest
10. An arrow in a bow has 70 J of potential energy. Assuming no energy loss, how much kinetic energy will it have after
it has been shot?
a. 140 J
b. 70 J
c. 50 J
d. 35 J
11. If Skelly the skater’s speed is increased so he has twice the momentum, then his kinetic energy is increased by
a. Two
b. Four
c. Eight
d. Zero
12. A car that travels twice as fast as another when braking to a stop will skid
a. Twice as far
b. Four times as far
c. Depends on the mass of the cars
13. How much work is done in lifting 30 kg of bricks to a height of 20 m?
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14. A toy cart moves with a kinetic energy of 40 J. What will its kinetic energy be if its speed is doubled?
15. Discuss how energy conservation applies to a pendulum. a.Where is potential energy the most?
b. Where is potential energy the least?
c. Where is kinetic energy the most?
d. Where is kinetic energy the least?
e. Where is it moving fastest?
f. Where is it not moving?
Chapter 9 – Circular Motion
1. True/False Any force that causes an object to move in a circular path is called centripetal force.
2. True/False When you whirl a can on the end of a string, the centripetal force on the can is actually the pull of the
string on the can (tension).
3. Which of the following is NOT a unit of rotational speed?
a. Revolutions per second
b. Rotations per second
c. Revolutions per minute
d. Meters per second
4. What is the direction of the force that acts on clothes in the spin cycle of a washing machine?
a. Outward
b. Inward
c. Up
d. Down
5. A tin can on the end of a string moves in a circle because
a. Once the can starts moving, that is its natural tendency
b. The can continually pulls on the string
c. There is a force on the can pulling it outward
d. The string continually pulls inward on the can
6. If you whirl a tin can on the end of a string and the string suddenly breaks, the can will
a. Fly directly away from you
b. Fly directly towards you
c. Fly off, tangent to its circular path
d. Spiral away from your hand
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7. A ladybug rests on the bottom of a tin can that is being whirled in a horizontal circle at the end of a string. What
exerts the force that holds this ladybug in a circle?
a. Your hand
b. The string
c. The can
d. Gravity
Chapter 12 – Universal Gravitation
1. True/False Because the earth is “falling” around the sun, it will eventually crash into it.
2. True/False Because the earth and moon are gravitationally attracted towards each other, they will soon collide.
3. True/False The gravitational force of the earth on an object decreases as the object moves farther from the earth.
4. True/False If the earth was its present volume but more massive, we would weigh more.
5. Why did Newton think there was force acting on the moon?
a. Because the moon always keeps one side toward the earth
b. Because the moon moves in a curved path
c. Because there is no air on the moon
d. Because the moon is moving
6. Newton had the insight to see that the
a. Moon always keeps one side toward the earth
b. Moon orbits the earth
c. Moon is moving
d. Force on the moon has the same nature as the force on an apple
7. Newton hypothesized that the moon
a. Is a projectile
b. Is actually attracted to the earth
c. Has tangential velocity that prevents it from falling into the earth
d. All of the above
8. Newton reasoned that the gravitational attraction between the earth and the moon must be
a. Directly proportional to the square of the distance between them
b. Inversely proportional to the square of the distance between them
c. The same at all distances
d. Independent of distance
9. Gravitational forces are the weakest forces found in nature. Because of this
a. We cannot see the gravitational effect between a pencil and the earth
b. There is no gravitational force between two 1-kg masses
c. There is no movement between two 1-kg masses located near each other in space
d. Gravitational effects easily observed involve one or more large masses
10. The gravitational force between two massive spheres
a. Is always an attraction
b. Depends on how massive they are
c. Depends inversely on the square of the distances between them
d. All of the above
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11. Suppose the gravitational force between two massive balls in 10 N. If the distance between the balls is cut in half,
what is the force between the masses?
a. 40 N
b. 20 N
c. 5 N
d. 2.5 N
12. Suppose the gravitational force between two massive spheres is 10 N. If the distance between the spheres is doubled,
what is the force between them?
a. 40 N
b. 20 N
c. 5 N
d. 2.5 N
13. By what factor would your weight be multiplied if the earth’s diameter shrank to half and the earth’s mass doubled?
14. Imagine you are standing atop a ladder so tall that you are 3 times as far from the earth’s center. What would be your
weight at the top, relative to your weight at the surface?
15. What does it mean that the moon is falling around the earth?
16. Why doesn’t the moon collide with the earth?
Chapter 21 – Temperature, Heat, and Expansion
1. True/False Heat is the energy that transfers from one object to another because of a temperature difference.
2. True/False When two or more substances reach a common temperature, they are said to be in thermal equilibrium.
3. True/False The total of all energies in a substance is its temperature
4. True/False A calorie is a common unit of force.
5. Temperature is the measure of
a. Total energy in a substance
b. Total kinetic energy in a substance
c. Average energy in a substance
d. Average molecular kinetic energy in a substance
6. Heat is measured in
a. Calories
b. Kilocalories
c. Joules
d. All of the above
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7. The energy content of a piece of food is determined by
a. Measuring the volume of the food
b. Eating the piece of food
c. Burning the food
d. None of the above
8. Specific heat capacity is related to the amount of heat
a. A specific object has
b. One molecule contains
c. Transferred by one molecule
d. Needed to change the temperature of one gram of a substance one degree
9. Which has the higher specific heat capacity, water or sand?
a. Water
b. sand
c. they both have the same specific heat capacity
10. A bimetallic strip will bend when heated because
a. Each metal expands at a different rate
b. Metals bend when heated
c. Each side of the strip is at a different temperature
d. Metals contract when heated
Chapter 22 – Heat Transfer
1. True/False A good conductor of heat is usually composed of atoms with tightly bound electrons.
2. True/False All objects radiate energy.
3. True/False A good reflector of heat is a poor absorber of heat.
4. True/False A good emitter of heat is also a good reflector of heat.
5. True/False The rate of cooling of an object is proportional to the temperature difference between the object and its
surroundings.
6. Heat transfer of conduction occurs when
a. Electrons bump into atoms and other electrons
b. Large numbers of atoms move from place to place
c. Atoms give off heat in the form of electromagnetic waves
d. Electromagnetic waves travel from one place to another through a vacuum
7. A piece of metal will feel colder than a piece of wood at the same temperature. Why?
a. Metal is colder than wood at the same temperature
b. Metal has a higher specific heat capacity than wood
c. Metals are better heat conductors than wood
d. Wood is a poor insulator
8. Styrofoam is a good heat
a. Emitter
b. Absorber
c. Conductor
d. Insulator
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9. Heat transfer by convection occurs when
a. Electrons bump into other electrons
b. Large numbers of atoms move from place to place
c. Atoms give off heat in the form of electromagnetic waves
d. Electromagnetic waves travel from one place to another through a vacuum
10. The reason you can hold your fingers beside a candle flame without getting hurt is that
a. Air is a poor heat conductor
b. Hot air rises
c. Hot-air convection currents travel upward
d. All of the above
11. Heat travels from the sun to the earth by the process of
a. Conduction
b. Convection
c. Radiation
d. Insulation
12. Two pots are filled with boiling water. The pots are exactly the same size, but one pot is white and the other is black.
Which pot cools faster?
a. The white pot
b. The black pot
c. Neither. Both cool at the same rate
13. Which cools at the faster rate, a pot of boiling water left at room temperature or a pot the same size of lukewarm water
left at room temperature?
a. The boiling water
b. The lukewarm water
c. Neither the initial cooling rates are the same
Chapter 15 – Change of Phase
1. True/False When steam changes to water at 100 degrees Celsius, energy is released.
2. True/False When ice changes to water at 0 degrees Celsius, energy is released.
3. Freezing occurs when matter changes from a
a. Gas to a solid
b. Solid to a gas
c. Liquid to a gas
d. Liquid to a solid
4. When water freezes, it
a. Gives off energy
b. Absorbs energy
c. Neither gives off nor absorbs energy
5. What amount of energy is needed to change 1000 g of 0oC ice to 10oC?
6. How much energy is needed to change 1 gram of ice at 0oC to 1 gram of steam at 100oC?
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Chapter 27 – Light
1. True/False Most of the electromagnetic spectrum consists of visible light.
2. True/False Energy emitted by vibrating electric changes is carried by electromagnetic waves.
3. Electromagnetic waves are
a. Transverse waves
b. Longitudinal waves
4. Which of the following is NOT an electromagnetic wave?
a. Sound
b. Radio
c. Light
d. X-ray
5. Heat lamps give off mostly
a. Radio waves
b. Microwaves
c. Infrared waves
d. Ultraviolet waves
6. Compared to the average speed of light in air, the average speed of light in water is
a. less
b. faster
c. the same
7. The reason solar eclipses are seen less commonly than lunar eclipses is that
a. Solar eclipses don’t happen as often as lunar eclipses
b. The sun is farther from the earth than the moon is
c. The earth’s shadow on the moon is larger than the moon’s shadow on the earth
d. The sun is so much larger than the moon
8. What is the ultimate source of electromagnetic waves?
a. TV antennas
b. Vibrating atoms
c. Vibrating charged particles
d. Vibrating molecules
Chapter 28 – Color
1. True/False The sky is blue because air molecules absorb blue light.
2. The reason the sky is blue is that air molecules
a. Scatter blue light in all directions
b. Reflect blue light
c. Absorb yellow light
d. Absorb green light
3. The earth receives a significant amount of ultraviolet radiation from the sun. Luckily most of it doesn’t reach the
ground, because it is
a. Scattered by the upper atmosphere
b. Absorbed by a protective layer of ozone gas in the upper atmosphere
c. Absorbed by the large amount of air in the atmosphere
d. Actually there isn’t enough UV radiation coming from the sun to harm us
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4. On the moon, the daytime sky looks
a. Blue
b. Yellow
c. White
d. Black
Chapter 29 – Reflection and Refraction
1. True/False Reflection occurs when one part of a wave travels more slowly than another part.
2. The law of reflection says that
a. All waves incident on a mirror are reflected
b. Waves incident on a mirror are partially reflected
c. The angle a ray is reflected from a mirror is random
d. The angle of reflection from a mirror equals the angle of incidence
3. Refraction is the result of
a. Bending
b. More than one reflection
c. Displaced images
d. Different wave speeds
4. In a curved optical fiber, light
a. Bends and follows the curve of the fiber
b. Internally reflects in a succession of straight-line paths
c. Scatters in random directions from the fiber’s inner surface
d. Gains energy in each internal reflection
Chapter 30 – Lenses
1. True/False The eye contains a converging lens that focuses light
2. A converging (convex) lens
a. Is thicker in the center than at the edges
b. Will converge parallel rays of light
c. Refracts parallel rays of light
d. All of the above
3. All lenses rely on light having a
a. Consistent speed everywhere
b. Lower average speed in the lens
c. Wavelength and frequency, the product of which equals c
d. None of these
4. Which instrument is a human eye most similar to?
a. Telescope
b. Microscope
c. Camera
d. Slide projector
Chapter 32 – Electrostatics
1. True/False Electrons and protons have the same charge and therefore attract each other.
2. True/False Electric charge is neither created nor destroyed, but can be rearranged.
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3. True/False A material is a good insulator if outer electrons of atoms in the material are free to roam around.
4. Atomic nuclei of almost all atoms consist of
a. Only protons
b. Protons and neutrons
c. Protons and electrons
d. Neutrons and electrons
5. A positively charged object has
a. One proton
b. More electrons than protons
c. More protons than electrons
6. Coulomb’s Law says that the force between any two charges depends
a. Directly on the magnitude of the charges
b. Inversely on the square of the distance between the charges
c. Both of the above
d. Neither of the above
7. The electrostatic force between two charges located 2 meters apart is 0.10 N. What will the force be between these
charges when they are located 1 meter apart?
a. 0.40 N
b. 0.20 N
c. 0.10 N
d. 0.05 N
8. A 2-C charge and a 4-C charge attract each other with 10 N of force. How much will a 2-C charge and an 8-C charge
attract each other when placed the same distance apart?
a. 40 N
b. 20 N
c. 10 N
d. 8 N
9. In a good insulator, electrons are usually
a. Free to move around
b. Free to move around after an impurity has been added
c. Semi-free to move around
d. Tightly bound in place
10. The reason a charged balloon will stick to a wall is that
a. The charge is slightly sticky and acts like glue
b. Electrons transfer back and forth between the wall and the balloon
c. Induced opposite charges in the wall are closer than other wall charges
d. Balloon material simply sticks to walls
11. What is the difference between an insulator and a conductor?
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1. If two negative charges are held close together and then released, the charges will
a. Accelerate toward each other
b. Accelerate away from each other
c. Move at a constant speed away from each other
d. Not move
2. 10,000 electrons are removed from a neutral plastic ball. How is the ball charged now (+ or -)?
Chapter 34 – Electric Current
1. True/False Charge will move in a conductor when there is a difference in potential between the ends of the
conductor.
2. True/False The unit of electric current is the ampere
3. True/False When you turn on a light, electrons move at speeds near the speed of light in order to light up the light
bulb.
4. True/False Electrical outlets in our walls are a source of electrons to run electrical appliances.
5. An example of a voltage source is
a. A 9-V battery
b. Rubbing a balloon on someone’s hair
c. A car battery
d. All of the above
6. Electrical resistance in a wire depends on the wire’s
a. Conductivity
b. Length
c. Thickness
d. All of the above
7. Compared to thin wires, electrical resistance in thick wires is
a. Greater
b. Less
c. The same
8. When connected to a 120-V power supply, how much current exists in a light bulb that has a resistance of 240 ohms?
a. 28,800 A
b. 240 A
c. 120 A
d. 0.5 A
9. If you accidentally grabbed the prongs of a partially plugged-in 120-V electrical plug on a day when your skin
resistance was 120,000 ohms, how much current would pass through your body?
a. 12,000,000 A
b. 1000 A
c. 120 A
d. 0.001 A
10. The primary reason a bird can perch harmlessly on a bare high voltage wire is that
a. A bird has a very large electrical resistance
b. A bird’s feet are close together
c. There is no potential difference across the bird’s feet
d. All of these
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11. How much voltage is required to make 10 amperes flow through a 10-ohm resistor?
12. What is the power dissipated by a toaster that has a resistance of 20 ohms plugged into a 120-V outlet?
13. When we plug a light bulb into a wall outlet, where do the electrons come from?
Chapter 35 – Electric Circuits
1. True/False Light bulbs connected in series all carry the same current, regardless of their resistances.
2. True/False In a series circuit, the total voltage drop across a series of resistors is the sum of voltages drops across
each individual resistor.
3. True/False In a parallel circuit, current in each branch is the same.
4. True/False When resistors are arranged in parallel, their overall resistance is less than that of the smallest resistor.
5. True/False A fuse or circuit breaker used in a circuit is usually inserted in parallel.
6. When two light bulbs are connected in series the
a. Same amount of current always flows through each light bulb.
b. Current through each light bulb is proportional to its resistance
c. Neither of these
7. When one light bulb in a series circuit containing several light bulbs burns out
a. The other light bulbs burn brighter
b. Nothing changes in the rest of the circuit
c. None of the other bulbs will light up
8. When one light bulb in a parallel circuit containing several light bulbs burns out
a. The other light bulbs burn brighter
b. Nothing changes in the rest of the circuit
c. None of the other bulbs will light up
9. A 60-W light bulb is connected to a 12-V car battery. When another 60-W bulb is connected in parallel with the first
bulb, the battery’s output energy
a. Halves
b. Remains the same
c. Doubles
10. A closed circuit is a circuit in which current
a. Can flow
b. Is prevented from flowing
11. When resistors are put in series next to each other, their overall resistance is
a. Larger than that of any individual resistor
b. The same as the resistance of one of the resistors
c. Smaller than the resistance of any of the resistors
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12. When resistors are put in parallel with each other their overall resistance is
a. Larger than that of any other resistor
b. The same as the resistance of one of the resistors
c. Smaller than the resistance of any of the resistors
13. The total resistance of a 3-ohm resistor and a 6-ohm resistor in series is
a. 18 ohms
b. 9 ohms
c. 6 ohms
d. 3 ohms
14. What is the equivalent resistance of two 10-ohm resistors connected in parallel?
15. What is a parallel circuit?
16. How do voltages, current, and resistances add in a parallel circuit?
17. Draw a parallel circuit with 3 resistors.
Chapter 36 – Magnetism
1. True/False A magnetic field is produced by the motion of charged particles
2. True/False The magnetic pole in the Northern Hemisphere is located at the geographic North Pole.
3. If the north pole of one magnet is brought near the south pole of another magnet, the poles will
a. Attract each other
b. Repel each other
c. Not interact with each other at all
4. If you break a bar magnet in half, each half
a. Contains one magnetic pole
b. Becomes a bar magnet with two poles
c. Loses its magnetism
5. If you put a small compass in a magnetic field, the compass will
a. Swing in any random direction
b. Line up in a direction perpendicular to the magnetic field lines
c. Line up in a direction parallel to the magnetic field lines
d. Seek electrical charge concentrations
6. Magnetic field strength is
a. strongest close to a magnet
b. strongest far from a magnet
c. constant everywhere around a magnet
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7. Magnetic fields are produced by
a. Charges at rest
b. Moving particles
c. Moving particles of earth
d. Moving charged particles
8. Magnetic domains are
a. Clusters of atoms randomly aligned
b. Blocks of material
c. Regions that may or may not be magnetized
d. Regions of atoms magnetically aligned
9. The earth’s magnetic field is most likely due to
a. Millions of small magnets buried in the earth
b. Convection currents in the molten part of the earth’s interior
c. The rotation of the earth acting on all of the earth’s electrons
d. A magnetized solid inner core of the earth
10. What causes magnetic fields?
11. What happens if you keep breaking an iron magnet in two until you are left with a single iron atom?
Chapter 37 – Electromagnetic Induction
1. True/False An electromagnetic wave consists of an electric field vibrating at right angles to another electric field.
2. In a vacuum, electromagnetic waves travel at speeds
a. Greater than the speed of light
b. Equal to the speed of light
c. Less than the speed of light
Review
multiple
guess
answers
ch 2
1.T
2..F
3. F
4. F
5. F
6. D
7. D
8.A
9. D
10. B
11. C AND D
12. A
13. C
CH 3
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
ch 4
F
F
T
T
F
B
D
D
B
C
B
A
B
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
CH 5
1.
2.
3.
4.
5.
6.
7.
8.
CH 6
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
F
F
F
T
T
C
B
D
C
D
C
C
F
F
F
D
B
B
C
A
T
T
F
F
T
A
C
B
B
C
C
A
13.
CH 7
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
CH 8
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
CH 9
1.
2.
3.
4.
5.
B
F
F
F
T
T
A
B
D
C
B
D
C
B
T
T
T
F
B
C
A
A
A
B
B
B
T
T
D
B
D
6.
7.
CH 12
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
CH 21
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
CH 22
1.
2.
3.
4.
5.
6.
7.
20
C
C
F
F
T
T
B
D
D
B
D
D
A
D
T
T
F
F
D
D
C
D
A
A
F
T
T
F
T
A
C
8.
9.
10.
11.
12.
13.
CH 23
1.
2.
3.
4.
CH 27
1.
2.
3.
4.
5.
6.
7.
8.
CH 28
1.
2.
3.
4.
CH 29
1.
2.
3.
4.
CH 30
1.
2.
3.
D
B
D
C
B
A
T
F
D
A
F
T
A
A
C
A
C
C
F
A
B
D
F
D
D
B
T
D
B
4.
CH 32
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
C
F
T
F
B
C
C
A
B
D
C
1. B
CH 34
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
CH 35
1.
2.
3.
4.
5.
6.
7.
T
T
T
F
D
D
B
D
D
C
T
T
F
T
F
A
C
8.
9.
10.
11.
12.
13.
CH 36
1.
2.
3.
4.
5.
6.
7.
8.
9.
CH 37
1.
2.
B
C
A
A
C
B
T
F
A
B
C
A
D
D
B
F
B