Which factors affect the capacitance of a parallel-plate capacitor?

Which factors affect the capacitance of a parallel-plate capacitor?

• A. Color of plates
• B. Distance between plates and dielectric material
• C. Magnetic field and temperature
• D. Material of conductor only

Answer: (B)

Capacitance of a parallel-plate capacitor is determined by how much charge the capacitor can store per volt, which depends on the geometry and the material between the plates. The formula C = ε0 εr A / d shows that the capacitance increases with the plate area A and the dielectric constant εr, and decreases as the separation d between the plates increases. Since the option mentions the distance between plates and the dielectric material, these are the factors that directly affect C in the given scenario. The color of the plates and the conductor material don’t influence the capacitance in the ideal model (they affect other properties like resistance or construction, not the stored charge per volt). Magnetic fields and temperature have negligible direct effect on capacitance in basic terms, though temperature can subtly modify dielectric properties in some materials. Thus, the distance between plates and the dielectric material are the two factors that matter most here.

Capacitance of a parallel-plate capacitor is determined by how much charge the capacitor can store per volt, which depends on the geometry and the material between the plates. The formula C = ε0 εr A / d shows that the capacitance increases with the plate area A and the dielectric constant εr, and decreases as the separation d between the plates increases. Since the option mentions the distance between plates and the dielectric material, these are the factors that directly affect C in the given scenario. The color of the plates and the conductor material don’t influence the capacitance in the ideal model (they affect other properties like resistance or construction, not the stored charge per volt). Magnetic fields and temperature have negligible direct effect on capacitance in basic terms, though temperature can subtly modify dielectric properties in some materials. Thus, the distance between plates and the dielectric material are the two factors that matter most here.