Figure shows a cube made from twelve uniform wires. Find the magnetic field at the centre of the cube, if a battery is connected between the points A and H.

Figure shows a square loop made from a uniform wire. Find the magnetic field at the centre of the square if a battery is connected between the points A and C.

Figure shows a square loop made from a uniform wire. Find the magnetic field at the centre of the square if a battery is connected between the points A and C.

Figure shows a square loop made from a uniform wire. Find the magnetic field at the centre of the square if a battery is connected between the points A and C.

Figure shows a square loop made from a uniform wire. Find the magnetic field at the centre of the square if a battary is connected between points A and C.

Figure shows a square loop made from a uniform wire. If a battery is connected between the pionts A and C. What will be the magnetic field at the centre O of the square?

Figure shows a cube made of 12 resistance across a cube edge ab.

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