A circular coil of 16 turns and radius 10 cm carrying a current of 0.75 A , rests with its plane normal to an external field of magnitude `5.0xx 10^(-2)` T . The coil is free to turn about an axis in its plane perpendicular to the field direction. When the coil is turned slightly and released it oscillates about its stable equilibrium with a frequency of `2.0s^(-1)`. What is the moment of inertia of the coil about its axis of rotation ?

A circular coil of radius 10 cm and 100 turns carries a current 1 A. What is the magnetic moment of the coil ?

A circular coil of radius 10 cm and 100 turns carries a current 1A. What is the magnetic moment of the coil?

A circular coil of wire consisting of 100 turns, each of radius 8.0 cm carries a current of 0.40 A. What is the magnitude of the magnetic field B at the centre of the coil?

Consider a tightly wound 100 turn coil of radius 10 cm, carrying a current of 1 A. What is the magnitude of the magnetic field at the centre of the coil?

(a) A circular coil of 30 turns and radius 8.0 cm carrying a current of 6.0 A is suspended vertically in a uniform horizontal magnetic field of magnitude 1.0 T. The field lines make an angle of 60^@ with the normal of the coil. Calculate the magnitude of the counter torque that must be applied to prevent the coil from turning. (b) Would your answer change, if the circular coil in (a) were replaced by a planar coil of some irregular shape that encloses the same area? (All other particulars are also unaltered.)

A circular coil of radius 0.2 m having 2000 turns rotates with a uniform speed of 100 rpm in a uniform magnetic field of 0.2 T. The r.m.s. value of the induced voltage is

A rectangular coil of 300 tums has an average area of 25 cmxx10cm . The coil rotates with a speed of 50 cps in uniform magnetic field of strength 4xx10^(-2) About an axis perpendicular to the field. The peak value of the induced emf is (in volt)