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 circular coil of average radius 6 cm has 20 turns. A current 1.0 A is set up through it. Find the magnetic induction at (i) The centre of the coil

A long solenoid has 500 turns. When a current of 2A is passed through it, the resulting magnetic flux linked with each turn of the solenoid is 4xx10^(-3)Wb . The self-inductance of the solenoid is

The area of the coil in a moving coil galvanometer is 16 cm^(2) and has 20 turns. The magnetic induction is 0.2T and the couple per unit twist of the suspended wire is 10^(-6) Nm per degree. If the deflection is 45° calculate the current passing through it.

A circular coil of average radius 6 cm has 20 turns. A current 1.0 A is set up through it. Find the magnetic induction at (ii) At a point on its axis, 8 cm away from the centre

A circular coil is made from a wire of length 2m. Its radius is 4/pi cm. When a current of 1A passes through it, it’s magnetic moment is

A solenoid has length 0.4m , radius 1 cm and 400 turns of wire. If a current fo 5 A is passed through this solenoid, then what is the magnetic field inside the solenoid?

A rectangular coil 20cmxx20cm has 100 turns and carries a current of 1 A . It is placed in a uniform magnetic field B=0.5 T with the direction of magnetic field parallel to the plane of the coil. The magnitude of the torque required to hold this coil in this position is

A rectangular coil 20cmxx20cm has 100 turns and carries a current of 1 A . It is placed in a uniform magnetic field B=0.5 T with the direction of magnetic field parallel to the plane of the coil. The magnitude of the torque required to hold this coil in this position is

A solenoid of 2.5 m length and 2.0 cm diameter possesses 10 turns per cm. A current of 0.5 A is flowing through it . The magnetic induction at axis inside the solenoid is

Two circular coils of wire each having a radius of 4cm and 10 turns have a common axis and are 3cm apart If a current of 1A passes through each coil in the opposite direction find the magnetic induction (i) At the center of either coil (ii) At a point on the axis, midway between them .