A dielectric is an insulating material that is placed between the two conductive plates of the capacitor. The dielectric material serves a crucial role in the functioning of the capacitor by preventing direct electrical contact between the plates while allowing the storage and release of electrical energy. Examples of dielectric materials used in today’s capacitors include ceramics, polymers, paper, and electrolytes. The choice of dielectric material influences the performance characteristics of the capacitor, including its capacitance and voltage rating.