A parallel-plate capacitor is clamped to a stand such that its plates are vertical. It *** connected to a cell through a centre-zero galvanometer. A metal sheet which is parallel to the plates of the capacitor and whose thickness is slightly less than the separation between these plates is now allowed to fall under gravity though the plates, without touching them.
In the entire process of the metal sheet passing through the plates, which of the following statements will not be correct?
(a) Its gain in kinetic energy will be less than its loss in gravitational potential energy.
(b) Some heat will be produced in the electrical circuit.
(c) The cell will lose some electrical energy but never gain any energy.
(d) The current through the cell will reverse in direction at some point.
