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AQA A Level Physics question (electromagnetic induction)

Hi there, please may I have some help answering this question please?

AC generators can be understood using Faraday's law. The graph below shows how the flux linkage varies sinusoidally as a square coil with 1000 turns and a side length of 20cm is rotated in a uniform field of flux density 0.8T.

The coil rotates 15 (degrees) in 20s. Calculate the induced emf.
Thank you :smile:
any updates?

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