Coulomb's Law and Electric Force Quiz

What is the value of Coulomb’s Constant (k)?

• 9 x 10⁹ N·m²/C²

• 6.67 x 10⁻¹¹ N·m²/kg²

• 9.81 m/s²

• 1.60 x 10^-19 C

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A balloon with a charge of 4.0 x 10⁻⁶ C is held a distance of 0.70 m from a second balloon having the same charge. Calculate the force of repulsion.

• 0.29 N

• 0.46 N

• 0.23 N

• 0.15 N

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A positively charged object with a charge of 8.5 x 10⁻⁹ C is being used to balance the downward force of gravity on a 0.018 kg balloon that has a charge of 6.3 x 10⁻⁹ C. How high above the balloon must the object be held in order to balance the balloon?

• 0.15 m

• 0.25 m

• 0.35 m

• 0.45 m

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Consider two equal, positive point charges of 1.5 x 10⁻⁶ C that are situated on a plane of length 0.04 m. Determine the force between the charges.

• 12.6 N

• 15.8 N

• 10.1 N

• 8.99 N

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How would doubling each charge affect the resultant force between the charges according to Coulomb’s Law?

• The force would double.

• The force would quadruple.

• The force would remain the same.

• The force would halve.

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What happens to the force between two charges if the distance between them is halved?

• The force doubles.

• The force quadruples.

• The force halves.

• The force remains the same.

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What is the unit of electric charge in Coulomb’s Law?

• Newton (N)

• Coulomb (C)

• Joule (J)

• Meter (m)

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What is the relationship between force and distance in Coulomb’s Law?

• Force is directly proportional to distance.

• Force is inversely proportional to the square of the distance.

• Force is inversely proportional to distance.

• Force is directly proportional to the square of the distance.

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What happens to the force between two charges if one of the charges is tripled?

• The force triples.

• The force doubles.

• The force remains the same.

• The force halves.

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What is the SI unit of force in Coulomb’s Law?

• Newton (N)

• Coulomb (C)

• Joule (J)

• Meter (m)

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