Basic Electricity

 

Review Questions
1. What is the name for the flow of electrons in an electric circuit?

A. Voltage
B. Resistance
C. Capacitance
D. Current

2. What is the basic unit of electric current?

A. The volt
B. The watt
C. The ampere
D. The ohm

3. Which instrument would you use to measure electric current?

A. An ohmmeter
B. A wavemeter
C. A voltmeter
D. An ammeter

4. What is the name of the pressure that forces electrons to flow through a circuit?

A. Magnetomotive force, or inductance
B. Electromotive force, or voltage
C. Farad force, or capacitance
D. Thermal force, or heat

5. What is the basic unit of electromotive force (EMF)?

A. The volt
B. The watt
C. The ampere
D. The ohm

6. How much voltage does an automobile battery usually supply?

A. About 12 volts
B. About 30 volts
C. About 120 volts
D. About 240 volts

7. How much voltage does a wall outlet usually supply (in the US)?

A. About 12 volts
B. About 30 volts
C. About 120 volts
D. About 480 volts

8. Which instrument would you use to measure electric potential or electromotive force?

A. An ammeter
B. A voltmeter
C. A wavemeter
D. An ohmmeter

9. What limits the current that flows through a circuit for a particular applied DC voltage?

A. Reliance
B. Reactance
C. Saturation
D. Resistance

10. What is the basic unit of resistance?

A. The volt
B. The watt
C. The ampere
D. The ohm

11. Which instrument would you use to measure resistance?

A. An ammeter
B. A voltmeter
C. An ohmmeter
D. A wavemeter

12. What are three good electrical conductors?

A. Copper, gold, mica
B. Gold, silver, wood
C. Gold, silver, aluminum
D. Copper, aluminum, paper

13. What are four good electrical insulators?

A. Glass, air, plastic, porcelain
B. Glass, wood, copper, porcelain
C. Paper, glass, air, aluminum
D. Plastic, rubber, wood, carbon

14. What does an electrical insulator do?

A. It lets electricity flow through it in one direction
B. It does not let electricity flow through it
C. It lets electricity flow through it when light shines on it
D. It lets electricity flow through it


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