Electromagnetism

You can increase the strength of an electromagnet by:

• Decreasing the battery charge

• Decreasing the amount of loops in the solenoid

• Winding the coils more closely

• Winding the coils more loosely

Tags

NGSS.MS-PS2-3

Electromagnetic Induction is a technical way to say that we can create a magnetic field using electricity.

• True

• False

Tags

NGSS.HS-PS2-5

Particles with opposite charges ____________ and particles with same (or like) charges ____________.

• attract, repel

• repel, repel

• attract, attract

• repel, attract

Tags

NGSS.MS-PS2-5

What happens when an electric current flows through a wire?

• The wire begins to spin.

• Nothing happens.

• A field of gravity is created around the wire.

• A magnetic field is created around the wire.

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NGSS.MS-PS2-3

What does this image show?

• Parallel circuit

• Series circuit

• Magnet

• Electromagnet

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NGSS.MS-PS2-3

What type of core is best for electromagnets?

• Steel

• Iron

• Plastic

• Copper

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NGSS.MS-PS2-3

Probably the most useful thing about electromagnets is that they can be turned ________ and ________.

• on, off

• positive, negative

• north, south

• on, negative

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NGSS.MS-PS2-5

Electric motors are devices that convert _____ energy into  _____ energy.

• electrical; mechanical
• mechanical; electrical
• chemical; potential
• mechanical; kinetic

What device takes in mechanical energy and produces electricity?

• motor

• generator

• electromagnet

• battery

Tags

NGSS.MS-ETS1-1

Which way will NOT increase the strength of the magnetic field of an electromagent

• increasing the current

• using a stronger ferromagnetic core

• winding the coils closer together

• decreasing the number of loops