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8 February, 03:31

The magnitude of the magnetic field at a certain distance from a long, straight conductor is represented by B. What is the magnitude of the magnetic field at twice the distance from the conductor

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  1. 8 February, 07:05
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    B/4

    Explanation:

    The magnetic field strength is inversely proportional to the square of the distance from the current. At double the distance, the strength will be 1/2^2 = 1/4 of that at the original distance:

    The field at twice the distance is B/4.
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