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Question 28

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

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  1. A horizontal conducting ring is perpendicular to a uniform vertical magnetic field. When the ring is rotated through 180° about the horizontal axis, an average emf of 2.0μV is induced in the ring. The area enclosed by the ring is 4.0cm² and the rotation takes 2.0s.

What is the magnetic field?

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