Electricity and Magnetism Test Review

1) What is the main difference between how a permanent magnet and an electromagnet can be used?

• A permanent magnet can be turned on and off, while an electromagnet cannot.

• An electromagnet can be turned on and off, while a permanent magnet cannot.

• Both can be turned on and off.

• Neither can be turned on and off.

2) Which electromagnet would make more magnetism?

• Electromagnet with more coils

• Electromagnet with fewer coils

• Electromagnet with a weaker power source

• Electromagnet with a stronger power source

Tags

NGSS.MS-PS2-3

3) What kind of energy change does a generator perform?

• Electrical to mechanical

• Mechanical to electrical

• Chemical to electrical

• Thermal to mechanical

Tags

NGSS.HS-PS3-3

4) An electric motor performs what kind of energy change?

• Electrical energy to mechanical energy

• Mechanical energy to electrical energy

• Chemical energy to electrical energy

• Thermal energy to mechanical energy

Which electromagnet below would be stronger?

• A nail wrapped with 40 coils of wire

• A nail wrapped with 60 coils of wire

6) What would you expect to happen to an electric motor as the amount of electricity added to it is increased?

• The motor will run faster.

• The motor will run slower.

• The motor will stop running.

• The motor will overheat and burn out.

1) What is the main difference between how a permanent magnet and an electromagnet can be used?

• A permanent magnet can be turned on and off, while an electromagnet cannot.

• An electromagnet can be turned on and off, while a permanent magnet cannot.

• Both can be turned on and off.

• Neither can be turned on and off.

2) Which electromagnet would make more magnetism?

• The electromagnet with one battery

• The electromagnet with two batteries

Tags

NGSS.MS-PS2-3

3) What kind of energy change does a generator perform?

• Mechanical to electrical

• Electrical to mechanical

• Chemical to electrical

• Thermal to mechanical

4) What kind of energy change does an electric motor perform?

• Electrical to mechanical

• Mechanical to electrical

• Chemical to electrical

• Thermal to mechanical