A $4\,\mu F$ conductor is charged to $400\, volts$ and then its plates are joined through a resistance of $1\,k\Omega $. The heat produced in the resistance is ............... $J$
A$0.16$
B$1.28$
C$0.64$
D$0.32$
Medium
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D$0.32$
d Heat produced = Energy stored in capacitor
$ = \frac{1}{2}C{V^2}$$ = \frac{1}{2} \times 4 \times {10^{ - 6}} \times {(400)^2}$$ = 0.32\,\,J$
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