A moving coil galvanometer has 100 turns and each turn has an area `2.0 cm^2`. The magnetic field produced by the magnet is `0.01 T`. The deflection in the coil is `0.05` radian when a current of `10 mA` is passed through it. Find the torsional constant of the suspension wire.

A moving coil galvanometer has 50 turns and each turn has an area 210 . The magnetic field produced by the magnet inside the galvanometer is 0.02 . The torsional constant of the suspension wire is 10 . When a current flows through the galvanometer, a full scale deflection occurs if the coil rotates by 0.2 . The resistance of the coil of the galvanometer is 50 . This galvanometer is to be converted into an ammeter capable of measuring current in the range 01.0 . For this purpose, a shunt resistance is to be added in parallel to the galvanometer. The value of this shunt resistance, in , is __________.

The coil of a moving coil galvanometer has an effective area of 4x 10^(-2) m^(2) . It is suspended in a magnetic field of 5x 10^(-2) Wb m^(-2) . If deflection in the galvanometer coil is 0.2 rad when a current of 5 mA is passed through it, then

A moving coil galvanometer has N numbr of turns in a coil of effective area A , it carries a current I . The magnetic field B is radial. The torque acting on the coil is

A moving coil galvanometer has a 50-turn coil of size 2cm xx 2cm . It is suspended between the magnetic poles producing a magnetic field of 0.5 T . Find the torque on the coil due to the magnetic field when a current of 20mA passes through it.

A moving coil galvanometer has a circular coil of area 16 cm^(2) and 30 turns. It is mounted on a torsional spring of spring constant 100 Nm/rad. The coil turns by angle 21^(@) when a current 40 mA is passed through it. The magnitude of the uniform magnetic field produced by the permanent magnet inside the galvanometer is _________________T. [use cos 21^(@)=15/16, 21^(@)~~11/30 rad]

A circular coil of radius 10 cm having 100 turns carries a current of 3.2 A. The magnetic field at the center of the coil is

A coil has an inductance 0.05 H and 100 turns. Calculate the flux linked with it when 0.02A current is passed through it.

the inductance of a closed-packed coil of 400 turns is 8mH . A current of 5mA is passed through it. The magnetic flux through each turn of the coil is

A circular coil of 200 mm diameter is made of 100 turns of thin wire and carries a current of 50 mA. Find the magnetic field induction at the centre of the coil.

A moving coil galvanometer consists of a coil of N turns are area A suspended by a thin phosphor bronze strip in radial magnetic field B. The moment of inertia of the coil about the axis of rotation is l and c is the torsional constant of the phosphor bronze strip. When a current i is passed through the coil, it deffects through an angle theta When a charge Q is almost instantly through the coil the angular speed omega acquired by the coil is