6: Electric and Magnetic Forces

Which of the two below result in an attractive force?

• A positive charge and a negative charge

• Two negative charges

• Two south poles

• A north pole and a south pole

• Two postive charges

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Static electricity is the buildup of charges between two objects. What best explains why a balloon is attracted to hair when the two have been rubbed together?

• The balloon and hair both have positive charges

• The balloon and the hair both have negative charges

• The balloon and the hair both have neutral charges

• The balloon and the hair both have opposite charges

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Which of the following most closely resembles an electromagnetic?

• 
• 
• 
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Two bar magnets are held close together. They are released and allowed to move freely. The bar magnets quickly come together. Which best explains why this happens?

• The poles facing one another are both south poles

• The poles facing one another are both north poles

• The poles facing one another are opposite poles

• One magnet was bigger than the other

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Atoms That have a positive charge will be attracted to atoms with a ______________ charge.

• positive

• negative

• no charge

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What forces works only by combining electric and magnetic forces?

• electric

• magnetic

• static electricity

• electromagnet

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This force occurs when ions create attractive and repulsive forces.

• Electric Current

• Magnetic Force

• Electromagnet

• Magnetism

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

• Electric

• Electromagnetism

• Magnetism

• Static Electricity

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In a magnet the opposite poles will

• Attract

• Repel

• Neither

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Like poles will

• Attract

• Repel

• Neither

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