Electrostatics Question 93

Question: A $ 10pF $ capacitor is connected to a 50 V battery. How much electrostatic energy is stored in the capacitor [KCET 1999]

Options:

A) $ 1.25\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 10\times {{10}^{-12}}\times {{(50)}^{2}}=1.25\times {{10}^{-8}}J $



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