The field normal to the plane of a wire of n turns and radius r which carries a current i is measured on the axis of the coil at a small distance h from the Centre of the coil. This is smaller than the field at the Centre by the fraction
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
The magnetic field on the axis of a current i carrying coil of turns 
, radius 
and at a distance 
from the center of the coil.
…..(1)
The field at the center is given by
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