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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
9 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
2 years 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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