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A given length of a wire carries a stady...

A given length of a wire carries a stady current.It is bent first to from a circular plane coil of one turn. If loop same length is now bent more sharply to give a duble loop of smaller radius, then the magnetic field at the centre caused by the same current is

A

quarter of its first value

B

unaltered

C

four times of its first value

D

half of its first value

Text Solution

Verified by Experts

The correct Answer is:
C
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