Electrical Circuits Question Preview (ID: 46913)
How Do Circuits Work?
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1. All of the following are objects that use electrical circuits except. . .
a) A. a flashlight
b) B. a radio
c) C. a bicycle
d) D. an iron
2. Christmas lights are on a series circuit. The electricity has one pathway to flow. When one bulb burns out, the rest of the lights will. . .
a) A. stay on
b) B. go out
c) C. explode
d) D. none of the above
3. Which of the following could most likely be used to fix a broken circuit?
a) A. cotton yarn
b) B. rubber erasers
c) C. glass marbles
d) D. metal paperclips
4. Which of the following is the best reason why electricians use gloves when working on power lines?
a) A. to keep their hands warm
b) B. to protect them from electrical shock
c) C. to get a better grip on tools
d) D. none of the above
5. In order for an electrical circuit to work properly, the circuit must. . .
a) A. be complete
b) B. be incomplete
c) C. be open
d) D. only have 1 light bulb
6. Which of the following is the best conductor of electricity?
a) A. glass stick
b) B. copper wire
c) C. cotton string
d) D. rubber snake
7. Electricity in a circuit can produce all the following EXCEPT. . .
a) A. Light
b) B. Heat
c) C. Sound
d) D. Solar energy
8. A parallel circuit has more than one pathway for electricity to flow. If one light bulb goes out in a parallel circuit, what happens to the rest of the lights?
a) A. they will all go out
b) B. they will stay on
c) C. all the lights will explode
d) D. none of the above
9. Which of the following is the best electrical insulator?
a) A. copper wire
b) B. metal paper clip
c) C. rubber eraser
d) D. water
10. Which of the following best explains the difference between a conductor and an insulator?
a) A. Conductors block the flow of electricity and insulators allow the flow of electricity
b) B. insulators block the flow of electricity and conductors allow the flow of electricity
c) C. Conductors and insulators both block the flow of electricity
d) D. Conductors and insulators both allow electricity to pass through
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