Electrostatic Potential and Capacitance - Result Question 35
37. A parallel plate air capacitor is charged to a potential difference of $V$ volts. After disconnecting the charging battery the distance between the plates of the capacitor is increased using an insulating handle. As a result the potential difference between the plates [2006]
(a) does not change
(b) becomes zero
(c) increases
(d) decreases
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Answer:
Correct Answer: 37. (c)
Solution:
- (c) If we increase the distance between the plates its capacity decreases resulting in higher potential as we know $Q=C V$. Since $Q$ is constant (battery has been disconnected), on decreasing $C$, $V$ will increase.
