A calibration circuit has a fixed resistor and an adjustable resistor connected in series with a battery. The resistance of the adjustable resistor is increased while the battery's potential difference stays constant. What happens to the potential difference across the adjustable resistor?
It increases, because the potential difference across the fixed resistor decreases
It stays the same, because the battery's potential difference is constant
It decreases, because the potential difference across the fixed resistor increases
It increases, because the adjustable resistor now takes a bigger share of the current
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.