A moving coil galvanometer has 28 turns and area of coil is `4 xx 10^(-2) m^(2)`.If the magnetic field is 0.2 T, then to increase the current sensitivity by 25% without changing area and field, the number of turns should be changed to

The magnetic field at the center of a moving coil galvanometer is 0.25 T. The coil has an area of 0.2 m^(2) and has 28 turns. If the current senstivity of the MCG is to be increased by 25%, then the number of turns in the coil should be incrased by_________.Assume that all other things are kept constant.

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

The coil of galvanometer consists of 80 turns and effective area of 5 cm^(2) . The restoring couple is 10^(-8) Nm//radian. The magnetic field between the pole pieces is 5 T. The current sensitivity of this galvanometer is

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 5xx10^(-2)m^(2) . It is suspended in a magnetic field of 2xx10^(-2) Wbm^(-2) .If the torsional constant of the senpension fibre is 4xx10^(-9) Nmdeg^(-1) . Then find its current sensitivity in degree per microampere

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.