CUET · PHYSICS · PYQ PAPER 2025
Two charged conducting spheres of radii a and b are connected by a wire. The ratio of the electric fields at their surfaces respectively, is
- A a:b
- B ab: 1
- C b: a
- D 1 :ab
Answer & Solution
Correct Answer
(C) b: a
Step-by-step Solution
Detailed explanation
\( V_a = V_b \Rightarrow \frac{kQ_a}{a} = \frac{kQ_b}{b} \Rightarrow Q_a = Q_b \frac{a}{b} \) \( \frac{E_a}{E_b} = \frac{kQ_a/a^2}{kQ_b/b^2} = \frac{Q_a b^2}{Q_b a^2} = \frac{(Q_b \frac{a}{b}) b^2}{Q_b a^2} = \frac{b}{a} \)
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