Electrostatics Question 283
The plates of a parallel plate capacitor are pulled apart with a velocity $ v $ . If at any instant their mutual distance of separation is $ d $ , then the magnitude of the rate of change of capacitance depends on $ d $ as follows [MP PET 1991]
Options:
A) Zero
B) $ q/2 $
q
D) $ 2q $
Show Answer
Answer:
Correct Answer: A
Solution:
The $ \pm q $ charges appearing on the inner surfaces of A are bound charges. As B is uncharged initially, as it is isolated, the charges on A will not be affected on closing the switch S. No charge will flow into B.
BETA
