A rectangular coil of effective area `0.04 m^2` is suspended freely in a radial magnetic field `1 xx 10^2 Wb//m^2`. When a current of 5 mA is passed through the coil, it deflects through `60^@`? Find the torsional constant of the suspension fibre.

A rectangular coil of effective area 0.01 m^2 suspended freely in a radial magnetic field. The coil deflects through 30^@ when current of 0.5 xx 10^-3 A is passed through it. If torsional constant of suspension is 25 xx 10^-9 Nm//rad . Find 'B' magnetic induction.

A rectangular coil has 100 turns has length 5 cm and breadth 2 cm. It is suspended in radial magnetic field of induction 0.1 Wb//m^(2) . If a current of 100 muA is passed through the coil, then the torque acting on the coil is

A rectangular coil of effective area 0.05 m^2 is suspended freely in a radial field of 0.01 Wb//m^2 .If the torsional constant of suspension fibre is 5 xx 10^-9 N//m per degree, find the angle through which the coil rotates when a current of 300 muA is passed through it.

A rectangular coil of 10 turns and effective area 0.05 m^2 is freely suspended in a radial field of induction 0.01Wb/m^2 . If the torsional constant of suspension fibre is 5 xx 10^-9 Nm/degree , find the angle through which the coil rotates when a current Of 30 mu A is passed through it

A bar magnet of magnetic moment 200 A-m^(2) is suspended in a magnetic field of intensity 0.25 N//A-m . The couple required to deflect it through 30^(@) is

A rectangular coil of area 5.0 xx 10^(-4) m^(2) and 40 turns is pivoted about one of its vertical sides. The coil is in a horizontal field of 80 gauss. If a current of 0.20 mA produces an angular deflection of 20^(@) , then the torsional constant of the hair spring connected to the coil is (in Nm/degree)

A coil of effective area 2m^2 is placed at right angles to a magnetic field of induction 0.08 Wb//m^2 . Find the e.m.f. induced in it if the field reduces to ten percent of its original value in 0.6s

A rectangular coil has 100 turns each of area 50 cm^(2) . It is capable of rotation about an axis joining the mid points of two opposite sides. When a current of 5 A is passed through it while its plane is at right angles to a uniform magnetic field, it experiences a torque of 5 Nm. The magnetic field will be

A recantagular coil of length 0.12 m and width 0.1 m having 50 turns of wire is suspended vertically in unifrom magnetic field of srenght 0.2 Weber//m^(2) . The coil carres a current of 2 A. If the plane of the coil is inclined at an angl,e of 30^(@) with the direction of the feld the torque required to keep the coil in stable equilibrium will be