The electric current in a circular coil of 2 turns produces a magnetic induction B 1 at its center. The coil is unwound and is rewound into a circular coil of 5 turns and the same current produces a magnetic induction B 2 at its center. The ratio of 
is:
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
For 
Radius of coil = R 2 = 
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