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- 1. Multiple Choice
1. If you know the power rating of an appliance and the voltage of the line it is attached to, you can calculate the current the appliance uses by
multiplying the voltage by the power
dividing the voltage by the power
dividing the power by the voltage
- 2. Multiple Choice
Most of the circuits in your home are
Series
Closed
Parallel
- 3. Multiple Choice
Which of the following would reduce the resistance of a metal wire?
Increase thickness
Increase length
Increase temperature
- 4. Multiple Choice
Resistance is affected by a material’s
thickness
temperature
length
all the above
- 5. Multiple Choice
What type of current is used in a battery?
parallel
direct
alternating
- 6. Multiple Choice
How many paths through which charge can flow would be shown in a circuit diagram of a series circuit?
one
two
unlimited
- 7. Multiple Choice
The current in a clothes iron measures 5.0 amps. The resistance of the iron is 24 ohms. What is the voltage?
120V
19V
4.8V
- 8. Multiple Choice
Which of the following represents Ohm’s law?
R = V x I
V = I x R
V = I / R
- 9. Multiple Choice
What is the difference in electrical potential energy between two places in an electric field?
current
induction
potential difference
- 10. Multiple Choice
What is the unit of electric power?
watt
volt
ohm
- 11. Multiple Choice
If an atom loses electrons, it becomes a
negatively charged ion---anion
positively charged ion---cation
neutral ion
- 12. Multiple Choice
The type of current in your school is mostly
direct current
alternating current
series current
- 13. Multiple Choice
What is the SI unit of electric charge?
volt
ohm
Coulomb
- 14. Multiple Choice
If the two charges represented in the image were brought near each other, they would
attract each other
repel each other
have no affect on each other
- 15. Multiple Choice
Which of the following materials allows charges to flow easily?
electrical conductor
glass
electrical insulator
- 16. Multiple Choice
Which of the following provides electrical safety?
circuit breaker
ground-fault circuit interrupter
fuse
all the above
- 17. Multiple Choice
What is current that flows back and forth?
DC; direct current
AC; alternating current
electric current
- 18. Multiple Choice
In the diagram, what would happen if one of the bulbs in the circuit on the left burned out?
The other bulb would also go off because there is more than one path.
The other bulb would stay on because there is more than one path.
The other bulb would also go off because there is only one path.
The other bulb would stay on because there is only one path.
- 19. Multiple Choice
In the diagram, what would happen if one of the bulbs in the circuit on the right burned out?
The other bulb would also go off because there is more than one path.
The other bulb would stay on because there is more than one path.
The other bulb would also go off because there is only one path.
The other bulb would stay on because there is only one path.
- 20. Multiple Choice
In the diagram, which circuit is a series circuit?
one on the left
one on the right
both of them
- 21. Multiple Choice
How many hertz is the frequency of AC in the U.S.A?
50Hz
60Hz
120Hz
- 22. Multiple Choice
Pick the correct combination below
proton; positive
proton; negative
proton; neutral
- 23. Multiple Choice
Pick the correct combination below
electron; positive
electron; negative
electron; neutral
- 24. Multiple Choice
Pick the correct combination below
neutron; positive
neutron; negative
neutron; neutral
- 25. Multiple Choice
Pick all the common sources for voltage
light bulb
battery
generator
solar cell
- 26. Multiple Choice
Which of the following would be a load in a circuit?
battery
motor
switch
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