Electrostatics Question 99
Question: A $ 700pF $ capacitor is charged by a $ 50V $ battery. The electrostatic energy stored by it is [MH CET 2000]
Options:
A) $ 17.0\times {{10}^{-8}}J $
B) $ 13.6\times {{10}^{-9}}J $
C) $ 9.5\times {{10}^{-9}}J $
D) $ 8.7\times {{10}^{-7}}J $
Show Answer
Answer:
Correct Answer: D
Solution:
$ U=\frac{1}{2}CV^{2}=\frac{1}{2}\times 700\times {{10}^{-12}}{{(50)}^{2}} $
$ =8.7\times {{10}^{-7}}J $
