Moving Charges ...

In hydrogen atom, the electron is making 6.6 × 10¹⁵ rev/sec around the nucleus in an orbit of radius 0.528 Å. The magnetic moment (A – m²) will be

A triangular loop of side l carries a current I. It is placed in a magnetic field B such that the plane of the loop is in the direction of B. The torque on the loop is

Three long, straight and parallel wires carrying current are arranged as shown in the figure. The wire C which carries a current of 5.0 amp is so placed that it experiences no force. The distance of wire C from wire D is then

A vertical wire carrying a current in the upward direction is placed in horizontal magnetic field directed towards north. The wire will experience a force directed towards

A coil carrying electric current is placed in uniform magnetic field, then

A circular loop carrying a current is replaced by an equivalent magnetic dipole. A point on the axis of the loop is

A power line lies along the East–West direction and carries a current of 10 ampere. The force per metre due to the earth\'s magnetic field of 10^–4 tesla is

In ballistic galvanometer, the frame on which the coil is wound is non-metallic to

Two parallel beams of electrons moving in the same direction produce a mutual force

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