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
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
Magnetic field at a point on the axis of a loop is given by
Thus, 
.
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