An isolated metal sphere is charged. Which single quantity, if doubled, would also double the capacitance of the sphere?
The radius of the sphere.
The charge stored on the sphere.
The electric potential at the surface of the sphere.
The density of the metal.
22 exam-style questions on OCR A A Level Physics Capacitors, covering Capacitors, Energy, and Charging and discharging capacitors. Each one has a worked solution and a mark scheme showing where the marks go.