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Question 29

From Physics HL Paper 1A (May 2025, TZ2)

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  1. A rectangular coil rotates at a constant angular velocity. At the instant shown, the plane of the coil is at right angles to the line ZZ'. A uniform magnetic field acts in the direction YY'. The variation of emf with time t is shown.
Diagram showing a rectangular coil with axes X, Y, Z and a graph of induced electromotive force (emf) over time (t). The coil is shown in a 3D perspective, and the graph shows emf starting at a positive maximum, decreasing to zero, and remaining at zero.
Diagram showing a rectangular coil with axes X, Y, Z and a graph of induced electromotive force (emf) over time (t). The coil is shown in a 3D perspective, and the graph shows emf starting at a positive maximum, decreasing to zero, and remaining at zero.

What coil rotation about the axis specified produces this graph?

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