Coulombs law and Charges

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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NGSS.HS-PS2-4

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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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NGSS.HS-PS2-4

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Which is the value of the constant in Coulomb's equation?

• k = 9·10^-9

• k = 9.8

• k = 6.67·10^-11

• k = 9 ·10⁹

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NGSS.HS-PS2-4

In a good insulator, electrons are usually

• free to move around
• free to move around after an impurity has been added
• semi-free to move around
• tightly bound in place

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What variable is a Coulomb the unit for?

• Charge
• Force
• Distance
• Mass

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NGSS.HS-PS2-4

If one of the charges doubles, what happens to the force?

• it doubles

• it gets cut in half

• it quadruples

• it is cut by 1/4

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NGSS.HS-PS2-4

What happens to the force between two charged objects when you halve the distance between them?

• 2X

• 1/2X

• 4X

• 1/4X

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NGSS.HS-PS2-4

Heat always flows from a __________________ to a cooler object.

• warmer
• cooler
• coolest
• warmest

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NGSS.HS-PS3-4