A long wire carrying a steady current is bent into a circular loop of one turn. The magnetic field at the centre of the loop is B. It is then bent…

A long wire carrying a steady current is bent into a circular loop of one turn. The magnetic field at the centre of the loop is $\displaystyle B$. It is then bent into a circular coil of $\displaystyle n$ turns. The magnetic field at the centre of this coil of $\displaystyle n$ turns will be