Consider the circuit as shown in the figure. Where APB and AQB are semi-cricles. What will be the magnetic field at the centre C of the circular loop?

Derive an expression for magnetic field at the centre of circular current carrying coil.

Two identical circular wires P and Q each of radius R and carrying current 'I' are kept in perpendicular planes such that they have a common centre as shown in the figure. Find the magnitude and direction of the net magnetic field at the common centre of the two coils.

A 0.5m long metal rod PQ completes the circuit as shown in the figure. The area of the circuit is perpendicular to the magnetic field of flux density 0.15 T. If the resistance of the total circuit is 3Omega calculate the force needed to move the rod in the direction as indicated with a constant speed of 2 ms^(-1)

An infinitely long conductor as shown in figure, carrying a current I with a semicircular loop on X-Y plane and two straight parts, one parallel to X-axis and another coinciding with Z-axis. What is the magnetic field induction at the centre C of the semi-circular loop.

A uniform but time-varying magnetic field B(t) exists with in a circular region of radius a and is directed in to the plane of the paper as shown in the figure. The magnitude of the induced electric field at the point P at a distance r from the centre of the circular region

A wire loop is formed by joining two semicircular wires of radii r_1 and r_2 as shown in the figure . The loop carries a current I, find the magnetic field at the centre O.

A circular coil 'A' has a radius R and the current flowing through it is I. Another circular coil 'B' has a radius 2R and if 2I is the current flowing through it, then the magnetic fields at the centre of the circular coil are in the ratio of

A circular branching made from a uniform conductor is connected to a battery as shown in the figure. What force will the magnetic field of the currents in the branching exert on the agnetic pole placed at its centre O? Deduce the resutl qualtatively.

A rubber band is covered with a conducting and current passed through it in the direction as shown in the figure. What happens, when it is placed in the magnetic field vecB shown in the figure