Question

Describe the relationship between capaacitance and potential.

Answer 1

Potential difference across a capacitor can’t change suddenly. It varies according to the relation

V = C* dv/dt

Total charge on a Capacitor is fixed Q = I*t (time of charge).

Capacitance C is fixed for a given Capacitor based on its physical parameters and dielectric used.

When in circuit if Potential difference is applied across the capacitor, it starts charging, as it starts charging the potential difference across it starts building up.

After certain time the capacitor gets fully charged.

Then its charge is given by

Q = CV

and the potential difference is equal to its rated potential difference V and the current 'I' would become zero.