9. Electricity self-eval q's

A device that protects a circuit from being overloaded is called

fuse

The current which flows in one direction and then the other is called

alternating

Like static charges ______ each other, and unlike charges _______ each other.

repel, attract

Which of the following explains why a balloon rubbed with wool will stick to a wall?

unlike charges attract

Which of the following explains what happens if a light in a series circuit is removed (and nothing else is changed)?

the rest of the lights go out

Which of the following explains what happens if a light in a parallel circuit is removed (and nothing else is changed)?

the rest of the lights are not changed

How is a voltmeter connected in a circuit?

connected in parallel

How is an ammeter connected in a circuit?

connected in series

Given a voltage of 120 V, and a resistance of 8.9 ohms, what is the current?

none of the above

Given a resistance of 0.5 ohms, and a current of 7.0 amperes, what is the voltage?

3.5 volts

If the diameter of a resistor wire were increased, one would expect the resistance to

decrease

If the length of a resistor wire were increased, one would expect the resistance to

increase

If you have a 15 ampere fuse, (which will burn out at exactly 15 amps), on a 120 volt line, what is the maximum number of 100 watt light bulbs can you light before the fuse blows?

17

How much power is being used if the voltage is 12.1V and the current is 7.3 A?

88.3 watts