Electrostatics Review

When you brush your hair you scrape off electrons, and your hair

• becomes positively charged
• becomes negatively charged
• becomes positively and negatively charged
• remains uncharged, or neutral

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As a pair of charges is brought close together, the force between them

• Increases
• Decreases
• Increases only if they are the same sign
• Increases only if they are the opposite sign

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Gravitational force depends on mass.  What comparable quantity governs the electrical force?

• Volume
• Density
• Charge
• Charge density

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Which has more charge?

• Proton

• Electron

• Neither

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What method of charging is depicted here?

• Induction
• Conduction
• Reduction
• Friction

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What sign are the red and blue charges, from left to right?

• Positive, positive
• Positive, negative
• Negative, positive
• Negative, negative

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A charge placed in the presence of an electric field at 1m would feel ____ at 2m.

• the same force
• double the force
• one half the force
• one quarter the force

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What direction are the electric field lines around an electron?

• towards the charge
• away from the charge

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What does it mean when the electric field lines are close together?

• the field is positive
• the field is negative
• The field is strong
• the field is weak

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Which of the following labeled points is in the region with the strongest force of electric charge

• A
• B
• C
• D

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