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- 1. Multiple Choice
What do fuel cells, batteries, and solar cells have in common?
a. They all produce static electricity
b. They are all sources of direct current
c. They are all sources of alternating current
d. They can all be used to power automobiles
- 2. Multiple Choice
What can you infer about this source of electricity?
a. It is a source of alternating current
b. It is a source of direct current
c. It is a source of static electricity
d. It is a source of electromagnetic radiation
- 3. Multiple Choice
How does alternating current differ from direct current?
a. Alternating current produces more voltage than direct current
b. Alternating current always flows in the same direction; the direction of a direct current switches back and forth
c. Direct current produces more voltage than alternating current
d. Direct current always flows in the same direction; the direction of an alternating current switches back and forth
- 4. Multiple Choice
How does electricity travel from power plants to your house?
a. It travels through the air as electromagnetic waves
b. Through a series of generators
c. Through a series of many transformers
d. Through transmission wires
- 5. Multiple Choice
What is the function of every generator on Earth?
a. Changing wind energy into electrical energy
b. Changing heat energy into electrical energy
c. Changing mechanical energy into electrical energy
d. Changing solar energy into electrical energy
- 6. Multiple Choice
How does a generator create current?
a. By using an electromagnet
b. By using an internal combustion engine
c. By using a fan
d. By using energy from the sun
- 7. Multiple Choice
Place the following events in sequence: A) Voltage is increased by a transformer; B) Voltage is decreased by a transformer; C) Electrical current enters your home
a. A, B, C
b. B, A, C
c. A, C, B
d. B, C, A
- 8. Multiple Choice
Which of the following are sources of mechanical energy?
a. Cars and trucks
b. Radios and televisions
c. Transmission lines and transformers
d. Wind and fossil fuels
- 9. Multiple Choice
What is the main function of a turbine?
a. Producing a magnetic field
b. Spinning
c. Reducing the voltage of an electrical current
d. Increasing the voltage of an electrical current
- 10. Multiple Choice
What is one possible reason why it's a good idea to conserve electricity?
a. It is often produced by burning fossil fuels, which are a polluting, non-renewable resource.
b. Power companies only give each home a limited amount of electricity every day.
c. Using too much electricity can start dangerous electrical fires.
d. Using too much electricity can cause power plants to break down.
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