A metallic wire is folded to form a square loop a side `'a'`. It carries a current `'I'` and is kept perpendicular to a uniform magnetic field. If the shape of the loop is changed from square to a circle without changing the length of thw wire and current, the amount of work done in doing so is

A metallic wire is folded to form a square loop a side 'a'. It carries a current 'i' and is kept perpendicular to a uniform magnetic field. If the shape of the loop is changed from square to a circle withoul changing the length of the wire and current, the amount of work done in doing so is

A metallic wire is folded to form a square loop of side a . It carries a current i and is kept perpendicular to the region of uniform magnetic field B . If the shape of the loop is changed from square to an equilateral triangle without changing the length of the wire and current. The amount of work done in doing so is

A square loop of edge 'a' carries a current l. The magnetic field at the centre of loop is

A square loop of side a carris a current I . The magnetic field at the centre of the loop is

A square loop of side a carris a current I . The magnetic field at the centre of the loop is

A hexagonal loop of a metallic wire is of each side a and carries a current I . Find the magnitude of magnetic field at the centre of the loop.

Each side of a hexagonal loop of a metal wire is a. The loop carries a current I. Find the magnitude of the magnetic field at the centre of the loop