IB Physics HL D.4.4 Lenz’s law Question Bank

Practise IB Physics HL D.4.4 by applying lenz’s law 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 .

A small coil of wire of radius 2.0 cm and 20 turns is now located with its centre 10.0 cm from R. The current in R is kept constant at 2.0 A .

Figure for Question D.4.4 (HL)—Lenz’s law question 1 — IB Physics HL

Deduce the direction of the current induced in (c)(ii).

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D.4.4 (HL)—Lenz’s law question 1