Physics Electrostatics Potential & Capacitance All Topic Question for Revision Test MCQ (Single Correct)

A parallel plate capacitor is charged to a potential difference of 50 V. It is then discharged through a resistance for 2s and its potential drops by 10V. Calculate the fraction of energy stored in the capacitance

A
0.14
B
0.25
C
0.50
D
0.64

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Text Solution

Verified by Experts
The correct answer is:
D

Initial energy stored in the capacitor,

… (i)

After 2 s, when the potential drops by 10 V, the final potential is 40 V.
Final energy stored in the capacitor,

… (ii)

Fraction of energy stored

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