Electricity Type of Force

Charged objects can be attracted to:

• Neutral objects 
• Objects with the opposite charge
• Both

What types of charges repel?

• Positive and Positive
• Positive and Neutral
• Negative and Neutral
• Neutral and Neutral

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When Bethany walks across a carpet, her socks pick up many electric charges. Later in the day, these charges are no longer present on her socks. What most likely happened to the charges?

• The charges disappeared.
• The charges switched signs.
• The charges transferred to another object.
• The charges broke apart into smaller particles.

A repelling force occurs between two charged objects when the charges are of ______________.

• like signs
• unlike signs
• equal magnitude
• unequal magnitude

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The closer the charges, the ___________ the force between them

• closer
• further
• stronger
• weaker

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During a lightning storm, the bottom of a cloud gains a strong negative electric charge. Which of these describes the charge at the top of a tall metal pole directly under the cloud?

• The top of the pole would have no charge.
• The top of the pole would have a positive charge.
• The top of the pole would have a negative charge.
• The charge of the pole would not be affected by the charge of the cloud.

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Walking across a carpet is an example of charge being transferred by

• friction.
• induction.
• contact.
• static electricity

A balloon has a negative charge.  The glass rod has a positive charge.  What will happen when the glass rod is brought near the balloon?

• The balloon will be attracted to the rod
• The balloon will be repelled by the rod
• The balloon will remain in place
• The balloon will spin in circles

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To demonstrate static electricity, a teacher takes an inflated balloon and rubs it against his hair.  The rubber balloon picks up electrons from his hair, which makes his hair have

• a net negative charge
• a magnetic force
• a net positive charge

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This image shows two circular objects. Each object has an electric charge, as shown. Which statement describes the force that is exerted on the objects due to their electric charge?

• There is a force pushing both objects to the left.
• There is a force pulling the objects toward each other.
•                 There is a force pushing the objects away from each other.
• There is no force on the objects due to their electric charge.

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