JAMB Physics 2024 Paper

Concept:Inserting an insulating material (dielectric) between capacitor plates increases capacitance.Explanation:The capacitance of a parallel-plate capacitor is given by:$$C = \frac{\varepsilon A}{d}$$where $\varepsilon$ is the permittivity of the material between the plates.When a dielectric replaces air, the permittivity increases because the dielectric constant $k > 1$.Since $A$ and $d$ remain unchanged, a larger $\varepsilon$ gives a larger $C$.Answer:C. increase