Electricity and Magnetism

What is the material called that separates the two metals in a battery?

• anode

• electrolyte

• cathode

• neutralizer

Circuit A contains one light bulb. Circuit B contains two light bulbs in series. Everything else about the circuit is the same. Which circuit has more resistance?

• Circuit A

• Circuit B

• The same resistance because they are in series

• Both have no resistance because both are circuits

In a circuit, if you replace a bulb with 20 ohms of resistance with a bulb that has 30 ohms of resistance, you'd expect...

• the same amount of current running through the circuit

• less current running through the circuit

• more current running through the circuit

In a circuit, if you replace a bulb with 20 ohms of resistance with a bulb that has 30 ohms of resistance, you'd expect...

• the new bulb to provide the same amount of light

• the new bulb to provide less light

• the new bulb to provide more light

What part of a circuit is considered the "pump"?

• resistors

• the wire

• light bulbs

• batteries

If a light bulb is a diode...

• it will only light up if electrons flow through it the correct way.

• it doesn't matter which way electrons flow through it.

• it can light up without electrons flowing through it.

• it can never light up, only produce heat.

True or False: It doesn't matter which direction electrons flow through an incandescent (regular) light bulb to get it to light.

• True

• False

True or False: Electrons have to flow in one direction, and only one direction, in order to get an incandescent (regular) light bulb to light.

• True

• False

True or False: Flickering lights is a good reason to dislike using AC current.

• True

• False

Which type of light bulb would be off for a greater amount of time when using AC power?

• Incandescent light bulb

• LED light bulb

• They'd be on and off the same amount