A-Level UK (AQA, Edexcel, OCR) · Physics

Electricity

11 practice questions, each with the answer and an explanation.

Practise Electricity now

Random questions from this topic, one at a time. You see the answer and the explanation straight after each one.

All 11 questions

  1. A copper wire is 2.0 m long with cross-sectional area 0.50 mm2. The resistivity of copper is 1.7 x 10^-8 ohm m. What is its resistance?
  2. A cell has emf 12.0 V. When it supplies 2.0 A the terminal pd is 11.2 V. What is its internal resistance?
  3. A 9.0 V supply is connected across a 2.0 kilohm resistor in series with a 1.0 kilohm resistor. What is the pd across the 1.0 kilohm resistor?
  4. A 6.0 ohm and a 12 ohm resistor are in parallel, and this combination is in series with a 3.0 ohm resistor. What is the total resistance?
  5. A kettle is rated 2.3 kW at 230 V. What is the resistance of its heating element?
  6. At a junction, 5.0 A flows in. 2.0 A flows out along one wire and 1.5 A along another. What current flows out along the third wire?
  7. What happens to the resistance of an NTC thermistor as its temperature increases?
  8. A 1.0 mm2 copper wire carries 2.0 A. The charge carrier density is 8.5 x 10^28 m-3 and e = 1.6 x 10^-19 C. What is the drift velocity?
  9. A steady current of 3.0 A flows for 2.0 minutes. How much charge flows past a point?
  10. A 60 W immersion heater warms 1.0 kg of water (c = 4180 J kg-1 K-1) for 5.0 minutes, with no heat loss. What is the temperature rise?
  11. How should an ideal voltmeter be connected to measure the pd across a component?

Keep practising

More A-Level UK (AQA, Edexcel, OCR) topics

All A-Level UK (AQA, Edexcel, OCR) practice →

Electricity in other exams

Ready for the full A-Level UK (AQA, Edexcel, OCR) test?

Take a mock testA-Level UK (AQA, Edexcel, OCR) hub
Electricity practice questions | GetMyMockTest