Physics - electromagnetics

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7 Terms

1
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<p>What is an electromagnet?</p>

What is an electromagnet?

An electromagnet is a temporary magnet produced using an electric current

2
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If a wire with an electric current flowing through it, what does it have around it?

A magnetic field

3
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To get a stronger magnetic field around a wire with a current, what do you shape the wire into?

You shape the wire into a coil

4
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What can you add to the inside of a coil to make the electromagnet even stronger?

An iron core

5
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How do you turn an electromagnet on and off?

You turn off the current

6
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What are 3 ways to make the electromagnet stronger?

-increase the number of turns of the coil

-increase the current

-add an iron core

7
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What are 2 ways an electromagnet is different to a permanent magnet?

-an electromagnet can be turned off

-an electromagnet can be made stronger