A thin circular wire carrying a current `I` has a magnetic moment `M`. The shape of the wire is changed to a square and it carries the same current. It will have a magnetic moment

A flat circular coil, carrying a current, has a magnetic moment mu

Two wires of the same length are shaped into a square and a circle. If they carry same current, ratio of the magnetic moment is

Two wires of same length are shaped into a square and a circle. If they carry same current, ratio of the magnetic moment is

Two wires of same length are shaped into a square and a circle. If they carry same current, ratio of the magnetic moment is

Two wires of same length are shaped into a square and a circle. If they carry same current, ratio of the magnetic moment is

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