CUET · PHYSICS · PYQ PAPER 2023
A charge Q is divided into two parts, q and (Q-q). The repulsion between them is maximum when Q : q is
- A \( 2:1\)
- B \( 1:2\)
- C \( 4:1\)
- D \( 1:4\)
Answer & Solution
Correct Answer
(A) \( 2:1\)
Step-by-step Solution
Detailed explanation
\(F = k \frac{q(Q-q)}{r^2}\) \( \frac{d}{dq} [qQ - q^2] = 0 \) \( Q - 2q = 0 \) \( Q = 2q \) \( Q:q = 2:1 \)
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