Electrostatics Question 283
Question: The plates of a parallel plate condenser are pulled apart with a velocity $ v $ . If at any instant their mutual distance of separation is $ d $ , then the magnitude of the time of rate of change of capacity depends on $ d $ as follows [MP PET 1991]
Options:
A) Zero
B) $ q/2 $
C) 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 in to B.
