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Question 28

Physics HL Paper 1A (May 2025, TZ1)

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  1. Charge is moving in a wire that is at right angles to a uniform magnetic field.
    The length of the wire is (0.32\text{ m}).
    When the current in the wire is increased by (5.0\text{ A}), the force acting on the wire increases by (4.0\text{ mN}).
    What is the strength of the magnetic field?