Electrostatics Question 89

Question: A condenser having a capacity 2.0 micro farad is charged to $ 200\ volts $ and then the plates of the capacitor are connected to a resistance wire. The heat produced in joules will be [KCET 1992; JIPMER 2000]

Options:

A) $ 4\times 10^{4}J $

B) $ 4\times 10^{10}J $

C) $ 4\times {{10}^{-2}}J $

D) $ 2\times {{10}^{-2}}J $

Show Answer

Answer:

Correct Answer: C

Solution:

$ U=\frac{1}{2}CV^{2}=\frac{1}{2}\times 2\times {{10}^{-6}}\times {{(200)}^{2}}=4\times {{10}^{-2}}J $



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