Electrostatics Question 126
Question: The energy required to charge a capacitor of $ 5\mu F $ by connecting a d.c. source of 20 kV is [Pb. PMT 2002]
Options:
A) 10 kJ
B) 5 kJ
C) 2 kJ
D) 1 kJ
Show Answer
Answer:
Correct Answer: D
Solution:
$ U=\frac{1}{2}CV^{2}=\frac{1}{2}5\times {{10}^{-6}}\times {{(20\times 10^{3})}^{2}}=1kJ $
