A steady current is set up in a cubic network composed of wires of equal resistance and length d as shown in Fig. What is the magnetic field at centre P due to the cubic network?

A cube made of wire of equal length is connected to a battery as shown in figure.The magnetic field at the centre of the cube is

A wire of infinite length bent as shown in figure carries current l. What is the magnetic field at the point P ?

A long wire having a semi-circular loop of radius r carries a current I, as shown in Fig. Find the magnetic field due to entire wire.

The wire loop shown in figure carries a current as shown. The magnetic field at the centre O is ,

A current carrying wire AB of the length L is turned along a circle, as shown in figure. The magnetic field at the centre O.

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

An equilateral triangle of side length l is formed from a piece of wire of uniform resistance. The current I is as shown in figure. Find the magnitude of the magnetic field at its centre O .

A rectangular loop of metallic wire is of length a and breadth b and carries a current i. The magnetic field at the centre of the loop is