Physics-Coulomb's Law
NEET Physics Coulomb's Law MCQ Question
Type: MCQ-numerical-Hard-Class 12
Two point charges, q1 = 3 µC and q2 = -3 µC, are placed 10 cm apart in vacuum. What is the magnitude of the force between them?
A
8.1 N
B
9.0 N
C
8.1 × 10^-9 N
D
9.0 × 10^-9 N
Correct Answer
Option A
Detailed Explanation
Using Coulomb's law, F = k * |q1 * q2| / r^2, and substituting k = 9 × 10^9 Nm^2/C^2, q1 = 3 × 10^-6 C, q2 = -3 × 10^-6 C, and r = 0.1 m, we get F ≈ 8.1 N.
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