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7(c)2 marks

A sinusoidal alternating supply feeds a bridge rectifier circuit with a load resistor R of resistance 370 Ω, and the mean power dissipated in R has been calculated. The circuit of Fig. 7.1 is now disconnected, and R is connected directly across the power supply.

Explain, without calculation, how the mean power now dissipated in R compares with the answer in (b)(iii).

9702/41/M/J/24Cambridge International AS & A Level Physics 9702 · May/June 2024 · Paper 4 variant 1 · Question 7(c)

Fig. 7.1 — see the question text for what it shows

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Suggested time: 3 min