STANDARDPhysics-Electrostatics
STANDARD Physics Coulomb's Law MCQ Question
Type: MCQ-numerical-Medium
Two point charges of +3 μC and +4 μC repel each other with a force of 10 N. If each is given an additional charge of –6 μC, the new force is
A
2 N
B
4 N
C
5 N
D
7.5 N
Correct Answer
Option C
Detailed Explanation
Here, q₁ = +3 μC, q₂ = +4 μC, F = 10 N. q₁' = +3 – 6 = –3 μC, q₂' = +4 – 6 = –2 μC. Using the formula F' = (q₁'q₂')/(q₁q₂) × F, we find F' = 5 N.
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