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A 4 u F capacitor is charged to 400 volts and then its plates are joined through a resistance of 1 k W . The heat produced in the resistance is (a) 0.16 J (b) 1.28 J (b) 0.641 (d) 0.32 J



A 4 uF capacitor is charged to 400 volts and then its plates are joined through a resistance of 1 kW. The heat produced in the resistance is


        (a)    0.16 J


(b)    1.28 J


        (b)    0.641


        (d)    0.32 J


Grade:11

2 Answers

Hrishant Goswami
343 Points
7 years ago

(d)

The energy stored in the capacitor

 

   This energy will be converted into heat in the resistor.

Rishi Sharma
askIITians Faculty 646 Points
one year ago
Dear Student,
Please find below the solution to your problem.

The energy stored in the capacitor
= 0.5CV^2
= 0.5*4*10^-4*(400)^2
= 0.32 J
This energy will be converted into heat in the resistor.

Thanks and Regards

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