short answers

Question 1

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

Answer 1

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

Question 2

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

Answer 2

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

Question 3

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

Answer 3

• positive attracts to negative

- negative repel from negative & positive repel from positive

Question 4

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?

Answer 4

• energy, charge

- a potential difference supplies energy to make charges flow

Question 5

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

Answer 5

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

Question 6

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

Answer 6

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

Question 7

what is the difference between ac and dc?

Answer 7

ac- alternating current, flows 2 ways

dc- direct current, flows one way

Question 8

name some good conductors of electricity

Answer 8

any metal

ex.) copper, silver, gold

Question 9

name some good insulators of electricity

Answer 9

wood, plastic, glass

Question 10

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

Answer 10

voltage- volts
current- amps
resistance- ohms

Question 11

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

Answer 11

open = off
closed = on