A length `L` of wire carries a current `i`. Show that if the wire is formed into a circular coil, then the maximum torque in a given magnetic field is developed when the coil has one turn only, and that maximum torque has the magnitude `tau=L^2iB/4pi`

A length L of a wire carries a current I. Show that if the wire is formed into a circular coil, the maximum torque in a given magnetic fiel B, is developed when the coil has one turn only and the maximum torque has the value, tau_(max)=L^2IB//4pi .

A length L of a wire carries a current I. Prove that if the wise is formed into a circular loop, the maximum torque in a given magnetic field will be developed if the coil has one turn only. Find the value of the maximum torque acting on the circular coil.

Current i is carried in a wire of length L . If the wire is turned into a circular coil, the maximum magnitude of torque in a given magnetic field B will be

A coil of length L, carries a current i. The magnetic moment of coil is proportional to

For a given length l of wire carrying a current l, how many circular turns would produce the maximum magnetic moment ?

A wire of length l is formed into a circular loop of one turn only and is suspended in a magnetic field B. When a current i is passed through the loop, the maximum torque experienced by it is

A wire of length L carrying a current I is bent into a circle. The magnitude of the magnetic field at the centre of the circle is

A circular coil has one tum and carries a current i. The same wire is wound into a smaller coil of 4 turns and the same current is passed through it. The field at the centre :