IB Physics HL D.4.6 Rotation frequency and emf Question Bank

Practise IB Physics HL D.4.6 by applying rotation frequency and emf 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, fields or energy relationships

[Maximum number: 2]

A rod, R , lies perpendicular to a uniform magnetic field B of strength 0.50 T directed into the plane of the page. R is connected to a circuit and the electric current $I_{\mathrm{R}}$ is 2.0 A .

The coil is made to rotate such that an emf is induced. The graph shows the variation with time of the emf induced in the coil.

Figure for Question D.4.6 (HL)—Rotation frequency and emf question 1 — IB Physics HL

The frequency of rotation is doubled. Draw on the graph the variation with time of the new emf induced.

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D.4.6 (HL)—Rotation frequency and emf question 1