2024TrialMultiple choice

Q15

1 mark

Question

A coil of wire is rotating about a vertical axis in a magnetic field that is directed $45^\circ$ below the horizontal:

Which set of changes will result in the largest reading on the voltmeter?
A. Double $r$ and halve $l$ .
B. Increase both $l$ and $r$ by $50\%$ .
C. Rotate the magnetic field to vertical and double $r$ .
D. Rotate the magnetic field to horizontal and double $l$ .

Luna-requested uncropped source page for question 15; requires human review and cropping — Reviewed visual · source page 9

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Syllabus alignment

Module 6 · Electromagnetism

Applications of the Motor EffectAnalyse AC and DC generators, AC induction motors and magnetic braking using energy conservation.

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