A parallel-plate capacitor has capacitance C = 12.5 pF whenthe volume between the plates is filled with air. The plates are circular,with radius 3.00 cm. The capacitor is connected to a battery, and acharge of magnitude 25.0 pC goes onto each plate. With the capacitorstill connected to the battery, a slab of dielectric is inserted betweenthe plates, completely filling the space between the plates. After thedielectric has been inserted, the charge on each plate has magnitude45.0 pC. What is the potential difference between the plates before and after the dielectric has been inserted?

A parallel-plate capacitor has capacitance C = 12.5 pF whenthe volume between the plates is filled with air. The plates are circular,with radius 3.00 cm. The capacitor is connected to a battery, and acharge of magnitude 25.0 pC goes onto each plate. With the capacitorstill connected to the battery, a slab of dielectric is inserted betweenthe plates, completely filling the space between the plates. After thedielectric has been inserted, the charge on each plate has magnitude45.0 pC. What is the potential difference between the plates before and after the dielectric has been inserted?