A parallel -plate capacitor, whose plates are kept horizotnal is charged from a cell and then isolated from it. A dielectric slab which can just fit in the gap between the plates is now inserted to fill exactly half of the gap and then left alone. Neglect gravity and friction. The slab will

Options

A. remain stationary
B. move further into the gap
C. move out of the gap
D. either (b) and (c) depending on whether its dielectric constant is greater or less than 2

Answer

B