A thermistor is used in a circuit that controls the temperature of the water in a fish tank. At the temperature of the water, the thermistor has a resistance of 180 Ω and the potential difference across it is 9.0 V.
What is the current through the thermistor?
0.50 A0.50\ \text{A}0.50 A
20 A20\ \text{A}20 A
0.050 A0.050\ \text{A}0.050 A
1620 A1620\ \text{A}1620 A
82 exam-style questions on AQA GCSE Physics 2.1 Current, potential difference and resistance, covering 2.1.1 Standard circuit diagram symbols, 2.1.2 Electrical charge and current, 2.1.3 Current, resistance and potential difference, and 2.1.4 Resistors. Each one has a worked solution and a mark scheme showing where the marks go.