A small d.c. motor is being tested using a supply with a constant potential difference. The motor and a resistor whose resistance is much greater than the resistance of the motor are connected in a single loop. The resistor is removed and the motor is reconnected directly to the supply, so the loop remains complete. What is the effect on the circuit?
The total resistance increases substantially when the resistor is removed.
The current entering the motor becomes greater than the current leaving it.
The current in the loop increases substantially.
The potential difference across the motor becomes much smaller.
94 exam-style questions on AQA GCSE Physics 2.2 Series and parallel circuits, covering 2.2 Series and parallel circuits. Each one has a worked solution and a mark scheme showing where the marks go.