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Magnetic fields (A-level only)

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Question 35

A steady current $I\,$ dissipates power $P\,$ in a resistor of resistance $R$ . An alternating current through a resistor of resistance $4R\,$ has a peak value of $I$ . What is the average power dissipated in the second resistor?

$P2\frac{P}{2}$

$P$

$2 P$

$4 P$

Magnetic fields (A-level only) Questions

A Level
Physics
Magnetic fields (A-level only)