Published by:
CGP EDU Academic Team
Published on: August 21, 2026
A coil of one turn is made of a wire of certain length and then from the same length another coil of two turns is made. If the same current is passed in both the cases, then the ratio of the magnetic induction at their centres will be
A
2:1
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
Magnetic induction at the centre of current carrying coil,
Suppose, the length of the wire be 
.
1 st case For coil of one turn, let radius be 
2nd case For coil of two turns, let radius be 
From Eq. (i),
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