Consider two thin identical conducting wires covered with very thin insulating material. One of the wires is bent into a loop and produces magnetic field 
, at its centre when a current 
passes through it. The ratio 
is:
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
For loop 
where, 
is the radius of loop.
Then, 
Now, for coil 
at the centre 
radius of loop
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