A rectangular coil of size `3xx3cm` consisting of 100 turns caries `0.1A`. If it produces a deflection `10^(0)`, in a field of induction `0.1T`, the couple per unit twist is

A rectangular coil of area 2.5cm x 1.5cm has 100 turns. When a current of 2mA is passed through it, the deflection is 30° , The couple per unit twist of the suspended wire is 1.44 x 10^-4Nm/rad. The magnetic induction is nearly

A rectangular coil of area 2.5cm x 1.5cm has 100 turns. When a current of 2mA is passed through it, the deflection is 30° , The couple per unit twist of the suspended wire is 1.44 x 10^-4Nm/rad. The magnetic induction is nearly

A rectangular coil of wire of 500 turns of area 10xx5cm^(2) carries a current of 2A in a magnetic field of induction 2xx10^(-3)T . If the plane of the coild is parallel to the field. The torque on the coil is ( i n) Nm .

A rectangular coil of wire of area 400cm^(2) contain 500 turns. It is places in a magnetic field of induction 4xx10^(-3)T and it makes an angle 60^(@) with the field. A current of 0.2A is passed through is. The torque on the coil is

A circular coil of wire consisting of 100 turns each of radius 8cm carries a current of 0.4A. What is the magnitude of magnetic field at the center of the coil

A rectangular coil of a moving coil galvanometer has 50 turns and an area of 12cm^2 . It is suspended in a radial magnetic field of induction 0.025 Wb//m^2 . The torsional constant of the suspension fibre is 1.5 xx10^-9 Nm/degree. The current required to produce the deflection of 5^@ is

A rectangular coil of 200 turns and area 100 cm^(2) is kept perpendicular to a uniform magnetic field of induction 0.25 tesla. If the field is reversed in direction in 0.01 second, the average induced emf in the coil is