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 $
