Electric and Magnetic Forces

This force occurs when there is an attractive and repulsive force between two poles.

• Electric

• Electromagnetism

• Magnetic

• Static Electricity

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A directional flow of electrical charge through an object or medium

• Magnitude

• Magnetic force

• Electromagnetic force

• Current

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What will happen if the north ends of two magnets are placed near each other?

• They will attract each other.

• Both magnets will get weaker.

• They will repulse (repel) each other.

• Nothing will happen.

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Magnetic strength

• Attraction or repulsion that arises between electrically charged particles because of their motion

• Force resulting from interaction between electrically charged particles

• How strong a magnet is

• A directional flow of electrical charge through an object or medium

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A directional flow of electrical charge through an object or medium

• Magnitude

• Magnetic force

• Electromagnetic force

• Current

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As the distance between magnets increases, the attraction between them will –

• Increase

• Become stronger

• Decrease

• Stay the same

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How can the strength of an electromagnet increase?

• Remove the core, leaving only the coils of wire.

• Add more loops (coils) of wire around the core.

• Remove the battery.

• Remove loops (coils) of wire from around the core.

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What will happen if the south ends of two magnets are placed near each other?

• They will attract each other.

• Both magnets will get weaker.

• They will repulse (repel) each other.

• Nothing will happen.

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A balloon that has been rubbed on wool has a negative charge. When the balloon is held over—but not touching—some bits of paper, some of the bits jump up to the balloon. Why does the paper move?

• Some wind must have blown the paper.

• A charged object can make other objects move without touching them.

• A charged object can only push against other objects.

• All balloons are magnets that can pull on plastic or paper without touching it.

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Two magnets are shown above. What will happen if the magnets are slowly moved toward each other?

• The magnets will push against each other with a stronger force.

• The magnets will attract each other with a stronger force.

• The magnets will attract each other with a weaker force.

• The magnets will push against each other with a weaker force

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