Electromagnets/electricity review

The potential difference that causes charges to move in a circuit is ___.

• voltage
• resistance
• current
• electric discharge

An example of a voltage source is a _____.

• voltmeter
• battery
• resistance
• switch

A circuit breaker contains a thin strip of metal that melts if too much current passes through it.

• true
• false

Which of these materials is a good conductor of electricity?

• Rubber

• Metal

• Newspaper

• Glass

The student conducted an experiment with circuits. Why was the bulb bright when he closed the switch?

• The switch produced an electric current

• Closing the switch broke the circuit

• Closing the switch completed the circuit

• The switch did not make a difference

Which of the following items would conduct electricity?

• Aluminum ladder

• Metal screwdriver

• Wooden baseball bat

• Rubber flip flops

How can it be explained that someone's hair can stick to a balloon?

• There is static electricity

• There is too much dust in the air

• A parallel circuit was too long

• The person needs to wash his hair

A penny is an example of

• An insulator

• an electron

• a proton

• a conductor

which of the following materials are best used as insulators?

• Wood

• Rubber

• Metal

• Plastic

In this picture, the iron filings show the shape of the magnetic -

• pole

• core

• field

• axis