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Flashcards in short answers Deck (11)
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1
Q

what happens to charges between a balloon and wall that allow the balloon to stick to the wall?

A

in the negative balloon, negative charges push the other negatives away and attract the positive, making the wall positive.

2
Q

what is the analogy between an electrical circuit and a system that carries water? what do the different parts stand for?

A

wires (electrical current) are like water pipes (water current)

3
Q

in a sentence or two relate the following terms: positive charge, negative charge, attract & repel

A
  • positive attracts to negative

- negative repel from negative & positive repel from positive

4
Q

when talking about voltage, the terms that are important are ______ per unit ______. why is a voltage, or “potential,” difference important between the two ends of a battery?

A
  • energy, charge

- a potential difference supplies energy to make charges flow

5
Q

what is the voltage on a aa battery? aaa? d?

A

aa- 1.5v
aaa- 1.5v
d- 1.5v
————————–all are 1.5 volts

6
Q

what are the safety devices in chapter 7 that react to specific levels of current?

A

fuses, circuit breakers, gfci (ground fault circuit interrupter)

7
Q

what is the difference between ac and dc?

A

ac- alternating current, flows 2 ways

dc- direct current, flows one way

8
Q

name some good conductors of electricity

A

any metal

ex.) copper, silver, gold

9
Q

name some good insulators of electricity

A

wood, plastic, glass

10
Q

what are the units of measurement for voltage, current, and resistance?

A

voltage- volts
current- amps
resistance- ohms

11
Q

in a sentence or two relate the following terms: open circuit, closed
circuit, on, & off

A
open = off
closed = on