NEET2019Physics-Electrostatics
NEET 2019 Physics Coulomb's Law MCQ Question
Type: MCQ-conceptual-Medium-Class 12
Two point charges A and B, having charges + Q and – Q respectively, are placed at certain distance apart and force acting between them is F. If 25% charge of A is transferred to B, then force between the charges becomes:
A
16F/9
B
4F/3
C
F
D
9F/16
Correct Answer
Option D
Detailed Explanation
When 25% of charge from A is transferred to B, the new charges become 0.75Q an.75Q. The force is proportional to the product of charges, so the new force is (0.75Q * 0.75Q)/(Q * Q) * F = (9/16)F.
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