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Small drops of the same size are charges to V volt each. If n such drops coalesce to form a single large drop, its potential will be
Options
(a) Vn
(b) V/n
(c) Vn¹/³
(d) Vn²/³
Correct Answer:
Vn²/³
Explanation:
Potential at the surface of a solid charged sphere = (1 /4πε₀).(q / a)
(4/3) πr³ × n = (4/3) πr’³
Due to n changes, Vn = (1 /4πε₀).(nq / r’),
r’ = rn¹/³
Vn = (1 /4πε₀).(nq / n¹/³ r) = V n²/³
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Subject: Physics
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Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- If by mistake voltmeter is connected in series and ammeter in parallel then
- A body starts from rest with an acceleration of 2 m/s². After 5 second,
- If M (A; Z), Mₚ and Mₙ denote the masses of the nucleus AZ X, proton
- A capacitor of 10 µF charged upto 250 volt is connected in parallel with another
- A wheel has moment of inertia 5 x 10⁻³ kgm² and is making 20 revolutions per sec
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Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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