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Coulombs Law - Questions and Answers

Practice questions on Coulombs Law.

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1. If the distance between two charges is doubled, the electrostatic force between the charges will
A. be four times more
B. be four times less
C. increase two times
D. decrease two times
Explanation:
2. Force between two similar charges separated by 1 m and kept in air is
A. 9  109 N attractive
B. 9  109 N repulsive
C. 4π  10-7 N repulsive
D. 8.85418  10-12 N repulsive
Explanation:
3. Electrostatic force between two electrons fifers from the gravitational force between them since
A. gravitational force is weaker and repulsive
B. gravitational force is stronger and attractive
C. electrostatic force is weaker and attractive
D. electrostatic force is stronger and repulsive
Explanation:
4. Algebraic sum of electric charges remain constant in a closed system. This is the law of conservation of
A. mass
B. energy
C. momentum
D. charge
Explanation:
5. Force between two charges is calculated using
A. Lenz’s law
B. Faraday’s law
C. Kirchoff’s law
D. Coulomb’s law
Explanation:
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