Electrostatics Question 131

Question: A 10 micro-farad capacitor is charged to 500 V and then its plates are joined together through a resistance of 10 ohm. The heat produced in the resistance is [Orissa JEE 2003]

Options:

A) 500 J

B) 250 J

C) 125 J

D) 1.25 J

Show Answer

Answer:

Correct Answer: D

Solution:

$ U=\frac{1}{2}CV^{2}=\frac{1}{2}\times 10\times {{10}^{-6}}\times {{(500)}^{2}} $

$ =1.25J $



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