IB Physics HL B.5.10 DC and AC Question Bank

Practise IB Physics SL/HL B.5.10 by applying dc and ac concepts to exam-style physics questions.

Exam points

identify the relevant physical quantity, model or diagram
apply the correct equation and units to the evidence
justify the result using conservation laws, forces or energy relationships

[Maximum number: 1]

A direct current I in a lamp dissipates power P. What root mean square (rms) value of an alternating current dissipates average power P through the same lamp?

$\frac{I}{2}$

$\frac{I}{\sqrt{2}}$

$I \sqrt{2}$

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B.5.10—DC and AC question 1