Capacitor is an arrangement to increase the charge carrying capacity of a conductor:- The two plates of the capacitor have equal and opposite charges.

A parallel plate capacitor is charged and the charging battery is then disconnected. If the plates of the capacitor are moved farther apart by means of insulating handles. .....(a)the charge on the capacitor increase (b)the voltage across the plates increases (c)the capacitance increases (d)the electrostatic energy stored in the capacitor decreases