TCI: Unit 2: Lesson 4 What Can Magnetic Forces Do?

What does electromagnetic mean?

• A magnet that can turn on and off.

• A magnet that cannot turn on or off.

• A push or pull between two or more magnets or between a magnet and certain types of metal

• A magnetic force.

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What is a permanent magnet?

• A magnet that can turn on and off.

• A magnet that cannot turn on or off.

• A push or pull between two or more magnets or between a magnet or certain types of metal.

• A magnetic force.

What is a magnetic force?

• A magnet that can turn on and off.

• A push or pull between two or more magnets or between a magnet and certain types of metal.

• A washer

• A magnet that cannot turn on or off.

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Every magnet has a north pole and a south pole. Unlike poles ________.

• repel

• attract

Poles that are the same, or like poles, ________

• repel

• attract

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Where are magnetic forces strongest?

• near the poles of a magnet

• farther away from the poles of a magnet

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What is happening is this picture?

• The iron filings are not attracted to the ends of this magnet.

• Most of the iron filings are attracted to the ends of this magnet.

• Most of the iron filings are attracted to the middle of this magnet.

• The iron filings are repeling against this magnet.

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A magnet's properties affect its magnetic force. For instance, magnets come in different sizes. Bigger magnets pull with a force (a)   than smaller magnets of the same type.

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What are three properties of permanent magnets?

What happens when electricity stops flowing through an object that is being controlled by an electromagnet?

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