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 $
