An isolated parallel-plate capacitor initially carries a charge of magnitude on each plate

PHYSICS · Single correct · CBSE · Physics · Electrostatic Potential and Capacitance · Electrostatic Potential and Capacitance

Problem

An isolated parallel-plate capacitor initially carries a charge of magnitude QQ on each plate. A dielectric slab with dielectric constant κ>1\kappa>1 is completely inserted between the plates without any external connections. Which statement best describes the subsequent change in the potential difference ΔV\Delta V across the plates? (a) ΔV\Delta V decreases to ΔVκ\dfrac{\Delta V}{\kappa}. (b) ΔV\Delta V remains unchanged. (c) ΔV\Delta V decreases to ΔVκ2\dfrac{\Delta V}{\kappa^{2}}. (d) ΔV\Delta V decreases to ΔVκ\dfrac{\Delta V}{\sqrt{\kappa}}.

Related theory

Browse the problem library