IB Physics HL D.4.5 Rotating-coil emf Question Bank

Practise IB Physics HL D.4.5 by applying rotating-coil 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 coil is rotating in a region of magnetic field with angular speed $12.56 \mathrm{rad} \mathrm{s}^{-1}$ . At t=0, the field is parallel to the surface of the coil.

Figure for Question D.4.5 (HL)—Rotating-coil emf question 1 — IB Physics HL

Draw, on the axes, a graph to show the variation with time of the induced emf in the loop. (No numbers are required on the vertical axis.)
emf

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D.4.5 (HL)—Rotating-coil emf question 1