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10 June, 11:43

Consider the magnetic field (B) of a wire with a constant current (I). A Magnetic Field sensor is placed at a radius (r). Will the magnitude of the magnetic field change if the sensor was moved around the wire while holding the current and radius constant?

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  1. 10 June, 14:48
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    No, the magnitude of the magnetic field won't change.

    Explanation:

    The magnetic field produced by a wire with a constant current is circular and its flow is given by the right-hand rule. Since this field is circular with center on the wire the magnitude of the magnetic field around the wire will be given by B = [ (/mi_0) * I] / (2/pi*r) where (/mi_0) is a constant, I is the current that goes through the conductor and r is the distance from the wire. If the field sensor will move around the wire with a fixed radius the distance from the wire won't change so the magnitude of the field won't change.
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