Question

After inserting a dielectric inside a parallel plate capacitor, charge on the plates .

• A. increases
• B. decreases
• C. remains same

Answer 1

The correct option is C remains same

Because the charge is stranded in the capacitor plates, the charge cannot change. Adding the dielectric increases the capacitance by a factor of K. To see what happens to the potential difference, look at Q = C ∆V. Increasing C while keeping the charge the same means that the potential difference decreases.