Electrostatics Question 149
Question: A 4 mF condenser is charged to 400 V and then its plates are joined through a resistance. The heat produced in the resistance is [UPSEAT 2004]
Options:
A) 0.16 J
B) 0.32 J
C) 0.64 J
D) 1.28 J
Show Answer
Answer:
Correct Answer: B
Solution:
$ U=\frac{1}{2}CV^{2}=\frac{1}{2}\times 4\times {{10}^{-6}}\times {{(400)}^{2}}=0.32J $
