← Back to full paperPrevious questionNext question

Question 31

From Physics HL Paper 1A (May 2025, TZ1)

Grade your answerAnswer this question in practice mode and submit it for feedback.Practice under timed constraintsOpen the paper flow with timed full-exam navigation.
View source PDF page 14
  1. A coil of wire rotates at a constant angular speed ω\omega in a uniform magnetic field.
    The variation with time of the emf in the coil is shown.
A sinusoidal graph showing the variation of emf (V/V) with time (ms). The amplitude is 10 V and the period is 1.0 ms.
A sinusoidal graph showing the variation of emf (V/V) with time (ms). The amplitude is 10 V and the period is 1.0 ms.

The angular speed is changed to 34ω\frac{3}{4}\omega.
What is the amplitude of the emf and the time period for the variation of the emf in the coil after the change?

A table with two columns: 'Amplitude of emf/V' and 'Time period/ms', and four rows (A, B, C, D) with numerical values.
A table with two columns: 'Amplitude of emf/V' and 'Time period/ms', and four rows (A, B, C, D) with numerical values.

Textbook topics in this question

Review the exact course sections assessed by each question part.

Mixed-topic question