Electrostatics Question 11

Question: A condenser of capacity $ 50\mu F $ is charged to $ 10\ volts $ . Its energy is equal to [CPMT 1978; MP PET 1994; MP PMT 2000]

Options:

A) $ 2.5\times {{10}^{-3}}\ joule $

B) $ 2.5\times {{10}^{-4}}\ joule $

C) $ 5\times {{10}^{-2}}\ joule $

D) $ 1.2\times {{10}^{-8}}\ joule $

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Answer:

Correct Answer: A

Solution:

$ U=\frac{1}{2}CV^{2}=\frac{1}{2}\times 50\times {{10}^{-6}}\times {{(10)}^{2}}=2.5\times {{10}^{-3}}J $



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