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Physics (AS & A Level) · Oct / Nov 2022 · Paper 11 · Question 32

9702Potential difference and power

A power supply is connected to a component by connecting wires of total resistance 4.9 Ω. The power supply has an output power of 3.6 W and a terminal potential difference of 12 V. How much thermal energy is dissipated in the connecting wires in a time of 1.0 hour?

  1. A0.44 J
  2. B29 J
  3. C1.6 kJ
  4. D11 kJ

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Correct answer: C. 1.6 kJ

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