Electromagnets, Motors and Generators

While electric current is flowing through a wire, what surrounds the wire?

• a magnetic field
• a glowing light
• neutrons
• protons

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

What would increase the strength of an electromagnet?

• Increasing the amount of current flowing through the wire.

• Inserting a wooden core inside the coil

• Changing the direction of the current

• Decreasing the number of coils of wire

Tags

NGSS.MS-PS2-3

What must the student do in the picture, in order to induce electricity and move the the galvonometer

• nothing

• move the magnet

• add more loops of wire

• unplug the galvnonmeter

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

What happens to the strength of an electromagnet as you add more coils around it?

• Increases
• Decreases
• Stays the same
• Stops completely

Tags

NGSS.MS-PS2-3

What can you do to make electromagnets stronger?

• Increase number of coils of wire.

• Increase number of batteries used.

• Both A and B.

• Neither A nor B.

Tags

NGSS.MS-PS2-3

In an electrical generator, the energy transformation begins as ___________ and becomes ____________.

• mechanical; electrical

• electrical; mechanical

• electrical; chemical

• mechanical; chemical

Tags

NGSS.HS-PS3-3

NGSS.HS-PS3-2

Surrounding every magnet is a __________  __________.

• magnetic field
• electrical current
• another magnet
• an enemy

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

What is the transfer of electricity in a generator?

• Mechanical to Electrical 
• Physical to Potential 
• Electrical to Mechanical
• Yogurt to Light

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-3

What would happen if you broke a bar magnet into 8 pieces?

• You would have 8 half magnets

• You would have 4 complete magnets

• You would have 8 complete magnets

• They wouldn't be magnets anymore

A transformer actually transforms

• voltage

• magnetic field lines

• generators into motors

Tags

NGSS.HS-PS2-5