egriffit374 egriffit374

23-01-2024
Physics

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A circular coil of radius R carries an electric current. The magnetic field due to the coil at a point on the axis of the coil located at a distance r from the center of the coil, such that r>>R, varies as
a) 1/r
b) 1/r2
c) 1/r3
d) 1/r4

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