A 100 turn rectangular coil ABCD (in XY plane) is hung from one arm of a balance Fig. EP 4.23 A mass 500 g is added to the other arm to balance the weight of the coil. A current 4.9 A passes through the coil and a constant magnetic field of 0.2 T acting inward (in xz plane) is switched on such that only arm CD of length 1 cm lies in the field. how much additional mass 'm' must be added to regain the balance?

What torque acts ona 40 turn coil of 100 cm^2 area carrying a current of 10 ampere held with its axis at right angle to magnetic field of flux density 0.2 tesla and plane of the coil parallel to the field?

A square current carrying loop is suspended in a uniform magnetic field acting perpendicular to the plane of the loop. If the force on one arm of the loop is vec(F) , the net force on the remaining three arms of the loop is

The two parallel circular loops of wire shown in fig each have a radius R = 20 cm and are separated by a distance a = 0.5 cm. The bottom loop is held fixed and the top loop hangs from one end of the arm of an equal arm balance. Since a is much smaller than R, the magnetic field produced by one loop at the other is practically the same as if both were long straight wires. if the current in each loop is 20 A. How much additional mass m must be added to the right-hand pan of the balance to keep the loops separated by 0.5 cm, when the currents are turned on?

A circular coil of 25 turns and radius of 12 cm is placed in a uniform magnetic field of 0.5 T normal to the plane of coil. If the current in the coil is 5 A, then total torque experienced by the coil.

A rectangular coil of n turns and area A is held in a uniform magnetic field B. If the coil is rotated at a steady angular velocity omega ,duduce an expression for induced emf in the coil at any instant of time