Magnetic fields (A-level only)

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Question 56

An experimental heating system consists of two independent heating elements, A and B. Element A, of resistance $R$ , is connected to a direct current (dc) supply of constant voltage $V$ , dissipating a thermal power $P$ .

Element B, of resistance $0.5 R$ , is connected to an alternating current (ac) supply that provides a sinusoidal voltage with a peak value of 3V.

What is the average power dissipated by Element B in terms of $P$ ?

$4.5 P$

$9 P$

$18 P$

$36 P$

Magnetic fields (A-level only) Questions

A Level
Physics
Magnetic fields (A-level only)

A Level
Physics AQA
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