An air-filled parallel plate capacitor is connected to a battery and allowed to cahrge up Now a slab of dielectric materialis placed between the plates of the capacitor while he capacitor is still connected to the battery. After this is done one would find-
A. The voltage across the capacitor has increased
B. The charge on the capapcitor has not changed
C. the energy stored in the capacitor has decreased
D. the cahrge on the capacitor has increased
E. None of the above