Coulomb Law

Which of the following charges will attract each other?

• -4 μC & -5 μC

• 4 μC & 5 μC

• 4 C & 5 C

• -4 μC & 5 μC

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Coulomb’s law states that the force between two charged objects will __________ when the magnitude (value) of the object’s charge increases.

• increase

• decrease

• stay the same

• first increase, then decrease

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The magnitude of the electric force between two charged objects is given by an equation known as:

• Coulomb's Law.

• Ohm's Law.

• Newton's Third Law.

• Murphy's Law.

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Coulomb's law also says if distance increases, then force

• decreases

• disapears

• destroyed in a heartbeat

• doubles

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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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The variable "r" in Coulomb's Law would have what units?

• Joules

• Coulombs

• Newtons

• Meters

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What happens to the force between two charged objects if you reduce the distance between two objects from 30 cm to 10 cm?

• 3X

• 20X

• 9X

• 1/3X

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What is the value of Coulomb's Electrostatic Constant?

• 8.99 x 10⁹ Nm²C^-2

• 8.987 Nm²C^-2

• 8.987 x 10¹¹ Nm²C^-2

• 7.1 x 10^4.5 Nm²C^-2

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What is the unit for electrostatic charge?

• Coulombs

• Newtons

• Meters

• Joules

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An electrostatic force of 2 X 10² N is exerted on a charge of 4 Coulomb at point P in an electric field. What is the magnitude of the electric field intensity at P?

• 8 X 10² N/C

• 5 N/C

• 2 X 10^-2 N/C

• 50 N/C

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