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 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 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 200 turn rectangular coil measuring 0.02 m xx 0.08 m of an ammeter is in a magnetic field of induction 0.2 tesla. The torsional constant of the suspension fibre is 5 xx 10^(-7) newton xx metre/degree. The maximum reading of the ammeter corresponds to a deflection of the coil through 45^(@) . If the magnetic field is radial, then the maximum current that can be measured with this ammeter is

A moving coil galvanometer has been fitted with a rectangular coil having 50 turns and dimensions 5 cmi xx 3 cm . The radial magnetic field in which the coil is suspended is of 0.05 wb//m^2 . The torsional constant of the spring is 1.5 xx 10^-9 Nm//degree . Obtain the current required to be passed through the galvanometer so as to produce a deflation of 30^@ .

A coil of effective area 4m^2 is placed at right angles to a magnetic field of induction 0.05Wb//m^2 . If the field is decreased to 20% of its original value in10 seconds, find the e.m.f. induced in the coil.

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 a moving coil galvanometer containing 100 turns and 5 cm long and 3 cm broad is suspended in a radial magnetic field of induction 0.025 Wb//m^(2) by a fibre of torque constant 1.5 xx 10^(-9) Nm per degree. The current for which coil will deflect through an angle of 10^(@) is

A coil of 100 turns each of area 0.1 m^2 is rotated at constant speed of 300 r.p.m. in a uniform magnetic field of induction 0.02 Wb//m^2 about an axis in the plane of the coil and perpendicular to the direction of the coil.Calculate the maximum value of induced e.m.f.