Electrostatic Potential and Capacitance - Result Question 25
27. A capacitor is charged by a battery. The battery is removed and another identical uncharged capacitor is connected in parallel. The total electrostatic energy of resulting system : [2017]
(a) decreases by a factor of 2
(b) remains the same
(c) increases by a factor of 2
(d) increases by a factor of 4
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Answer:
Correct Answer: 27. (a)
Solution:
- (a) When battery is replaced by another uncharged capacitor
As uncharged capacitor is connected parallel So,
and
Initial Energy of system,
Final energy of system,
From equation (i) and (ii)
i.e., Total electrostatic energy of resulting system decreases by a factor of 2
