Concepts Of Physics MCQ Edition [Volume 2]PhysicsCapacitors
The capacitance of a capacitor is independent of which of the following?
Options
- AThe size of the plates
- BThe charges on the plates
- CThe separation between the plates
- DThe shape of the plates
Correct answer
B. The charges on the plates
Step-by-step solution
The capacitance of a capacitor depends only on its geometry (size, shape, and separation of the plates) and the dielectric medium between the plates. For example, the capacitance of a parallel plate capacitor is given by C = ₀ A d , where A is the area of the plates and d is the separation between them. Although capacitance is defined as C = Q V , it is a constant for a given capacitor and does not depend on the charge Q on the plates or the potential difference V across them.