Question

A 4μF conductor is charged to 400 volts and
then its plates are joined through a resistance of
1 kΩ. The heat produced in the resistance is
(a) 0.16 J (b) 1.28 J
(c) 0.64 J (d) 0.32 J

Answer 1

ANSWER:

Correct option  (d) 0.32 J

EXPLANATION:

heat produced in resistor=energy stored in capacitor

12CV2=124×10−6×(400)2=0.32J