Download National 4/5 Homework One

S3 Physics Homework One
(Summary Notes pages 1, 2 and 16)
1. Draw the circuit symbols for the following components:
a) ammeter
b) voltmeter
c) resistor
(3)
2. Copy and complete the following sentences:
a) Current is the rate of flow of _____________.
b) __________ is a measure of the energy given to the charges in a circuit.
(2)
3. Calculate the electric current in a circuit if 8C of charge pass a point in the circuit in a
time of 32seconds.
(3)
4. Explain the difference between alternating and direct current.
(2)
S3 Physics Homework Two
(Summary Notes pages 3, 4, 16 and 17)
1. Using circuit symbols draw two lamps connected in a) series and b) parallel.
(2)
2. Which of the following circuit rules are for series and which are for parallel circuits?
A the current is the same at all points in the
circuit
B the sum of the branch currents is equal to the current drawn from the supply
C the voltage across components in this circuit is the same for all components
D the sum of the voltages across the components in this circuit is equal to the supply
voltage
(4)
3.
b) What are the current values at X and Y?
c) What is the voltage across the lamp?
(4)
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S3 Physics Homework Three
(Summary Notes pages 5 and 6)
1. Copy and complete the following:
Resistance is the __________ to the flow of current. Resistance is measured in units
called __________.
(2)
2. Draw the circuit symbol for an ohmmeter.
(1)
3. Draw a circuit diagram to show how an ammeter and a voltmeter would be used to
measure the resistance of a resistor connected to a battery.
(4)
4. Use Ohm’s Law to calculate the value of a resistor that has a voltage of 12V across it
when a current of 3A is flowing.
(3)
S3 Physics Homework Four
(Summary Notes pages 7 and 8)
1. An LED is an output device. Name two more output devices.
(2)
2. An LDR and a thermistor are examples of input devices. Name two more input
devices.
(2)
3. For the situations below name the most suitable device.
a) Output for an electrical fan
b) Output for an MP3 player
c) Input for a public address system
(3)
4. Draw the symbols and state the energy changes for your answers to Q.3.
(3)
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S3 Physics Homework Five
(Summary Notes pages 8, 9 and 18)
1. Draw the circuit symbol for the following logic gates,
a) AND-gate
b) OR-gate
c) NOT-gate
(3)
2. Which logic gate has the following truth table?
Input Input Output
A
B
C
0
0
0
0
1
1
1
0
1
1
1
1
(1)
3. Which logic gate “combines the input signals so that the output is only 1 when both
inputs are 1”?
(1)
4. Draw an electronic system that could be used to turn on a cooling fan during the day
when it becomes to hot.
(5)
S3 Physics Homework Six
(Summary Notes page 9)
1. What is the main energy change in the following electrical appliances:a) table lamp
b) kettle
c) microwave?
(3)
2. Which of the three appliances in Q.1 will have the lowest power rating?
(1)
3. Explain your answer to Q.2.
(1)
4. What is the unit that is used to measure electrical energy?
(1)
5. Put these appliances in order from highest power rating to lowest power rating.
1500W hairdryer; 2kW toaster; 800W microwave; 0.5kW fridge
(4)
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S3 Physics Homework Seven
(Summary Notes pages 9, 10 and 11)
1. Copy and complete the following sentences about electrical power.
a) A r_________ wire will h__________ up when a current passes through it.
b) Electrical power is a measure of the __________ transferred to an appliance every
second. The unit of electrical power is the __________.
(4)
2. A pair of straighteners is connected to an energy meter. After 300seconds the energy
meter reads 450000Joules. What is the power rating of the straighteners?
(3)
3. The input power from an electric motor is 800W. If the output power to the electric
motor is 600W, what is the efficiency of the electric motor?
(3)
S3 Physics Homework Eight
(Summary Notes pages 10 and 18)
1. Explain why you should never touch a mains plug with wet hands.
(3)
2. Copy and complete the following table for a correctly wired three pin plug.
Pin
Colour of
Insulation
Earth
Brown
(4)
3. Some hair-dryers are double insulated.
a) Which wire is not needed in a double insulated hair-dryer?
b) Draw the symbol for double insulation.
(2)
4. What are the two most commonly used fuse values in the UK?
(2)
5. Show by calculation that a 13A fuse should be used on a 1610W hair-dryer.
(4)
S3 Physics Homework Nine
(Summary Notes 11 and 12)
1. Draw a diagram of the magnetic field that surrounds a permanent magnet. Your
diagram should clearly show a North Pole and a South Pole on the magnet. Make sure
you include arrows on your field lines.
(5)
2. Copy and complete the following sentences.
a) When two North Poles are brought close together they will __________ each other.
b) When a North Pole and a South Pole are brought close together they will _________
each other.
c) A magnetic field can be created by passing a _________ through a wire.
(3)
3. Name two practical applications of an electromagnet.
(2)
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S3 Physics Homework Ten
(Summary Notes page 13)
1. Use the diagram to help you copy and complete the sentence below the dynamo.
When the _ _ _ _ _ _ is _ _ _ _ _ _ _ _ there will be _ _ _ _ _ _ _ _ _ _ energy generated
in the _ _ _ _.
(4)
2. Explain how an electromagnet is used in an electric bell.
(3)
3. Explain how the coil of wire is able to rotate in the following diagram.
(3)
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S3 Physics Homework Eleven
(Summary Notes pages 14 and 15)
1. Name two fuels that are used in non-renewable power stations.
(2)
2. What energy changes takes place in the following parts of a fossil fuel power station
a) the boiler
b) the generator?
(4)
3. Name two renewable energy sources that can be used to operate power stations.
(2)
4. Describe an advantage of using a non-renewable power station to generate electrical
energy for the National Grid.
(1)
5. Describe an advantage of using a renewable power station to generate electrical energy
for the National Grid.
(1)
S3 Physics Homework Twelve
(Summary Notes page 2)
1. Using your Physics knowledge of the relationship between pressure, force and area to
explain the following: A) why a drawing pin can be easily pushed into a wall?
B) why tractors that work on muddy fields need to have such large tyres?
(4)
2. A box exerts a downwards force of 40N. If the area of contact with the surface is 5m2,
what pressure does the box put on the surface?
(3)
-2
2
3. An object exerts a pressure of 30Nm on a flat surface. If the area of contact is 2.5m ,
what is the force on the surface?
(3)
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S3 Physics Homework Thirteen
(Summary Notes page 1)
1. Which Physics quantity can be defined as “the mass per unit volume”?
(1)
2. A Physics student has to put a density label on a solid, a liquid and a gas. Which label
should the student put on the solid?
LABEL A 3000kgm-3
LABEL B 1.8kgm-3
LABEL C 2000kgm-3
(1)
3. Complete the following table to show whether the substances float or sink in oil of
density 0.8gcm-3.
(2)
Substance
Density Float
(gcm-3) Or Sink
aluminium
2.7
copper
8.9
ice
0.92
wood
0.7
4. What is the density of 2400g plastic block, which has a volume of 2000cm-3?
(3)
-3
-3
5. A liquid of density 790kgm takes up a volume of 0.2m . What is the mass of the
liquid?
(3)
S3 Physics Homework Fourteen
(Summary Notes page 2)
1. Use some of the words below to copy and complete the statements about the Kinetic Theory of Gases.(2)
close together far apart fast large
organised random slow small
a) Gases are made up of lots of very __________ particles.
b) The particles in a gas are very __________ __________.
c) Gas particles always move in a very __________ fashion.
d) The particles in a gas are always moving at very __________ speeds.
2. What is the value of absolute zero on the degrees Celsius scale?
(1)
3. Give the value for the following Kelvin temperatures in 0C:a) 310K b) 453K c) 77K
(3)
4. According to Boyle’s Law, if mass and temperature do not change, what will happen to the pressure of a gas when it
has its volume reduced?
(2)
5. According to Charles’ Laws, if mass and pressure do not change, what will happen to the volume of a gas when its
temperature is increased?
(2)
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S3 Physics Homework Fifteen
(Summary Notes pages 3 and 4)
1. Copy and complete the following sentences about speed measurements.
 Using a stopwatch to measure time and a t________ w_______ to measure
distance it would be possible to measure the _________ speed of a vehicle.
 Using a l_________ g_________ connected to an electronic timer may be
necessary when finding the __________ speed of a vehicle.
(4)
2. What is the average speed of a car which travels 240m in 15 seconds?
(3)
3. A train travels from Glasgow to Edinburgh, a distance of 34km. If the journey takes
30minutes, what is the average speed of the train in kilometres per hour?
(3)
S3 Physics Homework Sixteen
(Summary Notes page 5)
1. Which quantity in Physics is defined as “the change in speed per unit time”?
(1)
2. A sports car changes speed from 13ms-1 to 27ms-1 in 3.5seconds. What is its
acceleration?
(3)
-1
3. A train starts from rest and reaches a speed of 15ms in 20seconds. What is its
acceleration?
(3)
4. A bowling ball is accelerated from rest at 2ms for 2s. What final speed will it reach?
(3)
-2
S3 Physics Homework Seventeen
(Summary Notes page 6)
1. Draw speed-time graphs to show the following types of motion:a) An object slowing down and coming to rest.
b) An object travelling with a constant speed.
c) An object speeding up from rest.
(3)
2. Draw the speed-time graph described by these statements:The object starts from rest and accelerates for 5seconds reaching a final speed of 12ms-1.
The object then continues at 12ms-1 for another 8seconds.
(4)
3. What total distance does the object travel in question 2?
(3)
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S3 Physics Homework Eighteen
(Summary Notes pages 7, 8 and 9)
1. What three factors can a force change about an object?
(3)
2. Draw a labelled diagram of a Newton Balance.
(2)
3. Give an example where friction is used to slow down a moving object.
(1)
4. Give an example where friction is used to make an object go faster.
(1)
5. In which unit is the value of a force measured?
(1)
6. Copy and complete this statement about Newton’s First Law of Motion.
“A stationary object will remain at rest or a moving object will remain with a constant
__________ unless an __________ force acts on the object.”
(2)
S3 Physics Homework Nineteen
(Summary Notes page 10)
1. Assuming no change in its mass, what will happen to an object’s acceleration when the
unbalanced force on it increases?
(1)
2. A sprinter of mass 80kg accelerates at 10ms-2. What is the force needed to produce this
acceleration?
(3)
-2
3. A 500g toy is accelerated at 6ms . What is the force producing this acceleration?
(3)
4. What is the acceleration of a 15kg object when a 60N force acts on it?
(3)
S3 Physics Homework Twenty
(Summary Notes pages 11 and 12)
1. What is the value for gravitational field strength on planet Earth?
(1)
2. A pupil has a mass of 56kg. What is their weight on planet Earth?
(3)
3. On planet X, the weight of an 8kg mass was measured, using a Newton balance, and found to be 96N.
What is the gravitational field strength on planet X?
(3)
4. Use your Physics knowledge to re-write the following incorrect statement.
“The moon is an example of an artificial satellite which orbits planet Earth.”
(1)
5. Use the following numbers to copy and complete these sentences.
24
28
36000
400000
The moon’s period is _____days.
The distance from the moon to planet Earth is _____km.
The period of a geostationary satellite is _____hours.
The distance from a geostationary satellite to planet Earth is _____km.
(2)
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S3 Physics Homework Twenty 0ne
(Summary Notes page 11)
1. Put the following in order of size, with the smallest first.
asteroid galaxy planet star
(2)
2. Which Physics term is defined as “the distance light travels in one year”?
(1)
3. By using Newton’s First Law, explain why a space shuttle can move with a constant
speed in space with its engines turned off.
(2)
4. Which of Newton’s Laws is sometimes quoted as “every action has a reaction”?
(1)
5. Draw a diagram to show the vertical forces acting on a rocket when it is launched.
(2)
6. What is the main energy change on the underside of a space shuttle on re-entry?
(2)
S3 Physics Homework Twenty Two
(Summary Notes pages 11 and 12)
1. Use your Physics knowledge to re-write the following incorrect statement.
“Planets behave differently from stars, and the Earth is at the centre of our Solar System.”
(1)
2. Copy and complete the following sentences.
An object inside a box would fall at the same rate as the box and would appear to be
__________. This means that astronauts inside a spaceship are in a constant state of
__________.
(2)
3. An optical telescope gathers light signals from space. Name two other types of signal
that can be gathered from space.
(2)
4. Which type of telescope would be used to look at the Sun or stars?
(1)
5. Which type of telescope would be used to look at pulsars and black holes?
(1)
6. What is the HST and what types of picture, other than light, has it sent back to Earth?
(3)
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S3 Physics Homework Twenty Three
(Summary Notes pages 1 and 2)
1. Sounds are produced when particles vibrate. Why does sound not travel through space?
(1)
2. Which Physics term is defined as “the number of waves which pass a point in one
second”?
(1)
3. What are ultrasounds?
(2)
4. What is the speed of sound in air?
(2)
5. Use the CRO traces below to answer the following questions.
a) Which trace displays the quietest sound?
b) Which two traces display sounds with the same amplitude?
c) Which trace displays the sound with the highest frequency?
(4)
TRACE A
TRACE B
TRACE C
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S3 Physics Homework Twenty Four
(Summary Notes pages 2, 3, 4 and 5)
1. Name one example of noise pollution.
(1)
2. What is the approximate sound level for a quiet classroom?
(1)
3. Which type of wave is defined as “the direction of vibration is at right angles to the
direction of wave travel”? Give an example of this type of wave.
(2)
4. An explosion at Edinburgh castle is heard four seconds later by a tourist who is
1320metres from the explosion. Calculate the speed of sound in air.
(3)
5. What is the speed of a water wave which has a frequency of 96Hz and a wavelength of
0.25metres?
(3)
S3 Physics Homework Twenty Five
(Summary Notes page 6)
1. What is the speed of all waves in the electromagnetic spectrum?
(1)
2. Which two members of the electromagnetic spectrum are represented by P and Q in the
following diagram?
(2)
Radio
Microwave
P
Visible
Q
X-ray
Gamma
Rays
3. Which member of the electromagnetic spectrum has the highest frequency?
(1)
4. Which member of the electromagnetic spectrum has the longest wavelength?
(1)
5. Name an industrial or medical application for each of the five members of the
electromagnetic spectrum shown in question two.
(5)
S3 Physics Homework Twenty Six
(Summary Notes pages 7 and 8)
1. Draw a diagram to show the Law of Reflection when light reflects of a plane mirror. Your diagram
should be drawn using a ruler and include the following labels:  normal
 angle of incidence
 angle of reflection
(4)
2. Draw a diagram which shows the refraction that takes place when parallel rays of light enter a convex
lens.
(3)
3. Draw a diagram which shows the refraction that takes place when parallel rays of light enter a concave
lens.
(3)
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