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Series and parallel circuits and powerAQA A-Level Physics: Mind map

What this mind map covers

  • Series
  • Parallel
  • Cells
  • Energy and power
  • Conservation

Exam questions on Series and parallel circuits and power

  1. A 12 V battery of negligible internal resistance is connected across two resistors joined in parallel. One resistor has resistance 4.0 Ω and the other has resistance 12 Ω.
    Explain why the combined resistance of the pair is less than 4.0 Ω.2 marks
  2. A mains heater is connected to a 230 V supply and is rated at 1.8 kW when operating normally. Assume its resistance is constant.
    Calculate the energy transferred by the heater when it operates normally for 5.0 minutes.2 marks
  3. A 9.0 V supply of negligible internal resistance is connected to a 6.0 Ω resistor in series with a parallel pair of resistors. Each resistor in the parallel pair has resistance 12 Ω.
    Calculate the total resistance of the circuit and the current drawn from the supply.3 marks
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Written by the Exaim team, led by Shaun Daswani (Head of Upper Secondary, Improve ME Institute; MSc Financial Mathematics, Imperial College London; BSc, UCL) and Jason Daswani (operational lead, Improve ME Institute; LSE).