Electrostatics Question 755

Question: The work done in placing a charge of $ 8\times {{10}^{-18}} $ coulomb on a condenser of capacity 100 microfarad is

Options:

A) $ 3.1\times {{10}^{-26}}joule $

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

C) $ 3.2\times {{10}^{-32}}joule $

D) $ 16\times {{10}^{-32}}joule $

Show Answer

Answer:

Correct Answer: C

Solution:

[c] Work done$ =\frac{1}{2}\frac{q^{2}}{C}=\frac{{{( 8\times {{10}^{-18}} )}^{2}}}{2\times 10\times {{10}^{-6}}} $

$ =32\times {{10}^{-32}}J $



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