Moving Charges ...

A small coil of N turns has area A and a current I flows through it. The magnetic dipole moment of this coil will be

Two long parallel conductors carry currents in opposite directions as shown. One conductor carries a current of 10 A and the distance between the wires is d = 10 cm. Current I is adjusted so that the magnetic field at P is at a distance of 5 cm to the right of the 10A current. Value of i is

A rectangular loop carrying a current i is placed in a uniform magnetic field B. The area enclosed by the loop is A. If there are n turns in the loop, the torque acting on the loop is given by

An electron moves with a constant speed v along a circle of radius r. Its magnetic moment will be (e is the electron\'s charge)

Four wires each of length 2.0 metres are bent into four loops P, Q, R and S and then suspended into uniform magnetic field. Same current is passed in each loop. Which statement is correct

A current carrying rectangular coil is placed in a uniform magnetic field. In which orientation, the coil will not tend to rotate

A current carrying circular loop is freely suspended by a long thread. The plane of the loop will point in the direction

A current carrying loop is free to turn in a uniform magnetic field. The loop will then come into equilibrium when its plane is inclined at

The expression for the torque acting on a coil having area of cross-section A, number of turns n, placed in a magnetic field of strength B, making an angle θ with the normal to the plane of the coil, when a current i is flowing in it, will be