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Static & Current Electricity Test
1. The unit that is used to measure the rate of flow of electric current is a(n)
a. Volts
d. Farads
b. Ohms
e. Amperes
c. Meters
.
2. What voltage is applied to a 4.76 Ω resistor if the current is 2.77 A?
a. 0.58 V
d. 13.2 V
b. 1.72 V
e. None of these
c. 0 V
3. An oil drop has a charge of -8.0 x 10-19 C. How many excess electrons does the oil drop have?
a. 1 electron
d. 7 electrons
b. 3 electrons
e. No extra
c. 5 electrons
4. What power is supplied to a motor that operates on a 120 V line and draws 1.00 A of current?
a. 0 W
d. 8.3 x 103 W
-3
b. 8.3 x 10 W
e. 120 W
c. 60 W
5. If three resistors are connected in parallel, there are
a. Five
b.Four
c. One
current paths in the circuit.
d.Three
e. Two
6. A device that measures the amount of current in a circuit is a(n)
.
a. Ammeter
d. Voltmeter
b. Resistor
e. Wire
c. Potentiometer
7. A charged object can attract a neutral object because the charged object induces a separation of
charge in the neutral object.
a. True
b. False
8. In which direction will the positively charged ball shown below move if the rods are equally
charged.
a.
b.
c.
9. When a water wheel drives a generator, the generator converts the
electric energy.
d.
of the water to
a. Potential Energy
b. Kinetic Energy
c. Work
d. Chemical Energy
e. Electric Energy
10. If two spheres were allowed to touch each other and were then separated, which of the
combinations would yield a -1 C charge on either one of the spheres?
a. +2 C and +3 C
d. -2 C and -3 C
b. -2 C and +3 C
e. +1 C and +4 C
c. +1 C and -3 C
11. The current flowing in an electric circuit can be increased by
a. Decreasing voltage or decreasing resistance
b. Increasing voltage or decreasing resistance
c. Decreasing voltage or increasing resistance
d. Increasing voltage or increasing resistance
.
12. Which diagram represents the electric field surrounding two unlike charges?
a.
b.
13. __________ occurs when an object feeds all of its charge to the earth and becomes neutral.
a. Grounding
d. Potential Difference
b. Capacitance
e. Lightning
c. Charging
14. The
of a conductor can be determined if potential difference and current are known.
a. Current
d. Capacitance
b. Voltage
e. Resistance
c. Potential Difference
15. When the distance between two point charges is tripled, how does the force between them
change?
a. It increases by a factor of 3.
d. It decreases by a factor of 9.
b. It decreases by a factor of 3.
e. It increases by a factor of 9.
c. It does not change.
16. Electric Field lines are shown leaving a negative charge and going towards a positive charge.
a. True
b. False
17. In an electric circuit,
a. Ammeters
are switches that act as safety devices.
b. Fuses and Circuit Breakers
c. Combined Circuits
d. Voltage Dividers
18. The force between two objects is 64 N. One has a positive charge of 1.4 C while the other has a
negative charge of 1.8 C. How far apart are the two objects?
a. 1.9 x 10-2 m
d. 53.0 m
b. 3.54 x 108 m
e. Not enough info to solve
c. 18824.85 m
19. When two objects are rubbed together, what moves from one object to another, creating charged
objects and static electricity?
a. Neutrons
d. Both a. and b.
b. Protons
e. Both b. and c.
c. Electrons
20. The strength of the force on a charge in an electric field depends on
a. Both the magnitude of the field and the size of the charge
b. The magnitude of the field
c. The size of the charge
d. The direction of the field
e. Both the magnitude and the direction of the field
.
21. A current of 0.800 A flows through a resistor when it is connected to a 12.0 V battery. What is the
resistance of the resistor?
a. 150 Ω
d. 0.15 Ω
b. 15 Ω
e. 0.015 Ω
c. 1.5 Ω
22. If four electric devices are connected in a series circuit, then the number of current paths is equal to:
a. One
d.Three
b.Two
e. Five
c. Four
23. As an electric field becomes stronger, the field lines should be drawn
.
a. Thicker
c. Closer together
b. Farther apart
d. Thinner
24. Magnetic Field lines are shown leaving a North pole and going towards a South pole.
a. True
b. False
25. Two negatively charged objects of -4.2 C each are separated by 0.46 m. What is the magnitude
of the force acting on each object?
a. -3.45 x 1011 N
d. -7.5 x 1011 N
b. 3.45 x 1011 N
e. Not enough info to solve
c. 7.5 x 1011 N
26. Bubble in “B”