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Question 31402

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Electrostatics: Coulomb's Law MCQ

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Coulomb's LawEasyQuestion 31402

Question

Coulomb's constant k in SI units is:

A
9×10⁶ N·m²/C²
B
9×10⁹ N·m²/C²
Correct
C
9×10¹² N·m²/C²
D
9×10³ N·m²/C²

Correct answer

9×10⁹ N·m²/C²

Explanation

k = 1/(4πε₀) = 9×10⁹ N·m²/C². With ε₀ = 8.85×10⁻¹² C²/N·m².

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