Electrostatics Question 101
Question: A $ 12pF $ capacitor is connected to a 50V battery. How much electrostatic energy is stored in the capacitor [AFMC 2000]
Options:
A) $ 1.5\times {{10}^{-8}}J $
B) $ 2.5\times {{10}^{-7}}J $
C) $ 3.5\times {{10}^{-5}}J $
D) $ 4.5\times {{10}^{-2}}J $
Show Answer
Answer:
Correct Answer: A
Solution:
$ U=\frac{1}{2}CV^{2}=\frac{1}{2}\times 12\times {{10}^{-12}}\times {{(50)}^{2}} $
$ =1.5\times {{10}^{-8}}J $
