| Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as: |
| Assertion (A): A capacitor is connected to a battery. If we move its plate further apart, work will be done against the electrostatic attraction between the plates and the energy of the capacitor gets decreased. |
| Reason (R): The energy stored in capacitor is dissipated in the form of heat energy. |
A) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A)
B) Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A)
C) Assertion (A) is true but Reason (R) is false
D) Assertion (A) is false and Reason (R) is also false
Correct Answer: B
Solution :
(b) When the plates of a capacitor are moved further apart, the capacitance gets decreased. As battery remains connected, hence charge \[q\left( =CV \right)\]on the plates is decreased and energy \[U=\left( 1/2\,C{{V}^{2}} \right)\]also decreases. Some charge from the plates flows to the battery i.e., some energy of capacitor is transferred to the battery. Work done against electrostatic attraction between plates is used in the transference of energy and is dissipated in the form of heat energy in connection wires.
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