Electrostatics Review

Which two particles are attracted to each other?

• Two neutrons

• A proton and an electron

• Two protons

• An electron and a neutron

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A repulsive force exists between which two particles?

• Two neutrons

• An electron and a neutron

• An electron and a proton

• Two protons

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As two oppositely charged particles approach each other, what happens to the electrical force between them?

• The attractive force increases

• The magnitude of the electric force decreases

• The repulsive force increases

• The magnitude of their charges increases

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What happens to the electric force between two charges when the distance is tripled?

• 3 times less electric force

• 3 time more electric force

• 9 times less electric force

• 9 times more electric force

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The figure shows a neutral glass rod and a positively charged metal sphere.

Which of the following best describes the movement of charges as this glass rod touches the sphere?

• Protons move from the sphere to the glass rod.

• Electrons move from the sphere to the glass rod.

• Electrons move from the glass rod to the sphere.

• Protons move from the glass rod to the sphere.

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What is the SI unit for charge?

• Joules

• Coulombs

• Newtons

• Meters

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A balloon is rubbed on a student's head. What occurs because of this?

• Charged particles on the balloon are destroyed

• Positively charged particles move from head to balloon

• Charged particles from the balloon are released into the air

• Negatively charged particles move from head to balloon

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Electrostatic force F is directly proportional to:

• r^2 (distance squared)
• q1
• q2
• both q1 and q2

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When distance increases, electrostatic force ____________; we call this relationship ____________ proportional

• decreases;directly
• decreases;inversely
• increases;inversely
• increases;directly

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The Electric Force is strongest when charges are...

• close together
• far apart
• the electric force is constant everywhere

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