Q. An insulator plate is passed between the plates of a capacitor. Then currentPhysics Question Image

 8874  219 MP PMTMP PMT 2007Electrostatic Potential and Capacitance Report Error

Solution:

As insulator plate is passed between the plates of the capacitor, its capacity increases first and then decreases as the plate slips out. As a result, positive charge on plate A increases first and then decreases, hence current in outer circuit flows from B to A and then from A to B.