IB Physics HL D 4 5 Hl Rotating Coil Emf Questions

Solve HL rotating-coil emf questions by connecting changing magnetic flux, sinusoidal voltage, phase, rms values, angular speed and coil orientation.

Exam points

Relate rotating-coil magnetic flux to sinusoidal induced emf.
Interpret phase, angular speed and graph relationships for alternating emf in rotating coils.
Determine instantaneous and maximum emf or power from rotating-coil induction.

[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 IB Physics HL D 4 5 Hl Rotating Coil Emf Questions 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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IB Physics HL D 4 5 Hl Rotating Coil Emf Questions question 1