A parallel-plate capacitor is connected to an ideal battery that maintains a constant…
PHYSICS · Single correct · CBSE · Physics · Electrostatic Potential and Capacitance · Electrostatic Potential and Capacitance
Problem
A parallel-plate capacitor is connected to an ideal battery that maintains a constant potential difference across its plates. A dielectric slab of dielectric constant κ(>1) is gently inserted so that it completely fills the space between the plates. Which statement correctly describes the change in the electrostatic energy stored in the capacitor?
(a) The electrostatic energy decreases by a factor of κ.
(b) The electrostatic energy remains unchanged.
(c) The electrostatic energy increases by a factor of κ.
(d) The electrostatic energy decreases by a factor of 1/κ.