A parallel-plate air-insulated capacitor is charged and remains connected to a constant DC voltage supply. The separation between the plates is tripled. Which statement is correct?
The capacitance of the capacitor is tripled.
The charge stored on the plates is reduced to one-third of its initial value.
The electric field strength between the plates remains constant.
The energy stored by the capacitor is tripled.
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.