A wire in the form of a circular loop of one turn carrying a current produces a magnetic field B at the centre. If the same wire is looped into a coil of two turns and carries the same current, the new value of magnetic induction at the centre is [CBSE 2002; KCET 2003]

\[\frac{{{\mu }_{0}}i}{2\pi b}\]

A wire in the form of a circular loop of one turn carrying a current p

1.	A wire in the form of a circular loop of one turn carrying a current produces a magnetic field B at the centre. If the same wire is looped into a coil of two turns and carries the same current, the new value of magnetic induction at the centre is [CBSE 2002; KCET 2003]
A.	\[5B\]
B.	\[3B\]
C.	\[\frac{{{\mu }_{0}}i}{2\pi b}\]
D.	\[4B\]
Answer» E.

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