Coulombs Law

What is used to calculate the magnitude of electric forces between charged objects?

• Newton's Law

• Coulomb's Law

• Ohm's Law

• Faraday's Law

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NGSS.HS-PS2-4

How do charge signs affect the direction of the force between charged objects?

• Like charges repel each other, and unlike charges attract each other.

• Like charges attract each other, and unlike charges repel each other.

• Charge signs do not affect the direction of the force.

• The force is always attractive regardless of charge signs.

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NGSS.HS-PS3-5

According to Newton's 3rd Law, what happens when opposite charges interact?

• A) They repel each other with equal magnitude of force.

• B) They attract each other with equal magnitude of force.

• C) They have no effect on each other.

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Fill in the blank: Similar to the gravitational force that exists between two objects with mass, the _______ is the force between two objects with electrical charge.

• electric force.

• magnetic force.

• nuclear force.

• frictional force.

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NGSS.HS-PS2-4

According to Coulomb, what happens to the electric force when the magnitude of the electric charges increases?

• It decreases proportionally.

• It remains the same.

• It increases proportionally.

• It is halved.

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NGSS.HS-PS2-4

Fill in the blank: When the distance between the charges was doubled, the electric force was ________.

• quartered.

• doubled.

• halved.

• unchanged.

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According to Coulomb's Law, the force between two point charges is inversely proportional to what?

• The square of the distance between the charges

• The product of the charges

• The sum of the charges

• The distance between the charges

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NGSS.HS-PS2-4

What is the value of Coulomb's constant (k) in the formula F = k * (|q1 * q2| / r^2)?

• 8.99x10^9 N·m^2/C^2

• 9.81 m/s^2

• 6.67x10^-11 N·m^2/kg^2

• 1.60x10^-19 C

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In the formula F = k * (|q1 * q2| / r^2), what do q1 and q2 represent?

• A) Electrostatic force in Newtons (N)

• B) Charges (+ or -) in Coulombs (C)

• C) Distance in meters (m)

• D) Coulomb's constant

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In the formula F = k * (|q1 * q2| / r^2), what does r represent?

• Electrostatic force in Newtons (N)

• Coulomb's constant

• Charges in Coulombs (C)

• Distance between the charges in meters (m)

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NGSS.HS-PS2-4