Electromagnets and Magnetic Fields

Types of Magnets

All Have Magnetic Fields

All Have Poles

Multiple Choice

Only some magnets have magnetic fields and poles.

• True

• False

Permanent Magnets

• Magnetic Field: Always

• Has Poles: Yes

• Control Strength: No

• Can Be Turned On and Off: No

Multiple Choice

What are magnets that always have a magnetic field called?

• permanent

• temporary

• optional

Multiple Choice

You can control the strength of a permanent magnet.

• True

• False

Multiple Choice

Permanent magnets can be turned on and off.

• True

• False

Uses of Permanent Magnets

• Holds Things Together

• Compass

• Generator

• Making a Temporary Magnet

Multiple Choice

What device uses a permanent magnet to show direction?

• compass

• generator

• temporary magnet

Temporary Magnets

• Magnetic Field: Comes and Goes (Electromagnets)

• Has Poles: Yes

• Control Strength: Yes

• Can Be Turned On and Off: Yes

Multiple Choice

How would the magnetic field of an electromagnet be described?

• always there

• comes and goes

• explosive

Multiple Choice

Electromagnets are what type of magnet?

• permanent

• temporary

• natural

Multiple Choice

The strength of an electromagnet can be controlled.

• True

• False

Multiple Choice

Electromagnets can be turned on and off.

• True

• False

Uses of Temporary Magnets

• Junkyard Lift

• Doorbell

• Motor

• Circuit Breaker

• Electronics

Multiple Select

What types of devices use electromagnets?

• Junkyard Lifts

• Motors

• Electronics

• Compass

• Doorbell