Electromagnet Lesson 1 review

What is an electromagnet

• a magnet with a magnetic field powered by current

• a magnet that has no poles

• a very large magnet that is buried

• a very weak magnet

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Which of the following are magnetic poles?

• North and South

• East and West

• Left and Right

• Red and Blue

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What do two unlike pole do when they are brought together?

• Nothing

• Attract

• Repel

• Balance

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The arrow on magnetic field lines show them flowing in which direction?

• Left to Right

• North to South

• South to North

• Outside

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Where is the magnetic force strongest around a bar magnet?

• At both poles

• In the middle

• At the north pole only

• At the south pole only

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Which of these is NOT necessary for a strong electromagnet?

• Iron Core

• Current

• Copper Wire

• Coiled wire

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What will happen in the diagram shown?

• Attract

• Repel

• Nothing

• Gravity

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Which 3 metallic elements attract to magnets?

• Cobalt

• Silver

• Nickel

• Iron

How can you reverse a magnetic field in a circuit?

• Flip the battery the other way

• Increase the current

• Increase the coils

• Use a different battery

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Domain Theory: When all the mini magnets are aligned they...

• Create a strong Magnetic field

• Create a weak Magnetic field

• Create a strong electric field

• Create a weak electric field

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