A parallel plate capacitor is connected to a battery as shown.

Consider two situations:

A: Key K is kept closed and plates of capacitors are moved apart using insulating handle.

B: Key K is opened and plates of capacitors are moved apart using insulating handle.

Which of the following are correct?

(a) In A : Q remains same but C changes.

(b) In B : V remains same but C changes.

(c) In A : V remains same and hence Q changes.

(d) In B : Q remains same and hence V changes.

(c), (d)

In case of A, Potential remains same as connected to battery, Now C changes as the distance change ,so the charge changes. In case of B, charge remains same as not connected to battery, Now C changes as the distance change ,so the potential difference changes