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

The coild of a galvanometer consists of 100 turn and effective area 1 cm^(2) . The restoring couple is 10^(-8) n-m//rad . The magnetic field between the pole pieces 5 tesla. The current sensitivty per micro ampere.

The coil of a moving coil galvanometer has 100 turns each of area 15 cm^(2) . It is suspended in a radial magnetic field of induction 3 xx 10^(-2)Wb//m^(2) . What is the current senstivity of the moving coil galvanometer, if the torsional constant of the suspension fiber is 1.5 xx 10^(-8)Nm /radian ?

The purpose of soft iron cylinder between the pole pieces of the horse - shoe magnet in a moving coil galvanometer is

A coil of a moving coil galvanometer has 100 turns and effective area of 0.005 m^(2) . It is suspended in a radial magnetic field of induction 0.001 Wb//m^(2) . The torque per unit twist of thr suspension fibre is 5 xx 10^(-9)Nm /degree. What is the currebnt sectivity of the moving coil galvanometer?

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 rectangular coil of a moving coil galvanometer contains 100 turns, each having area 15 cm^(2) . It is suspended in the radial magnetic field 0.03 T. The twist constant of suspension fibre is 15xx10^(-10) N-m/degree. Calculate the sensitivity of the moving coil galvanometer.

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