A tangent galvanometer gives a deflection of `30^(@)` whewn a current of 250 mA is passed through its coil. If the radius of the coil is 8 cm and `B_(H)=2.5xx10^(-5)Wbm^(-2)`. Find the length of the wire used in winding the coil.

When a current of 2 A is passed through a coil of 100 turns , flux associated with it is 5 xx 10^(-5) Wb. Find the self inductance of the coil.

A tangent galvanometer shown a deflection of 45^@ when 10 mA of current is passed through it. If the horizontal component of the earth's magnetic field is B_H = 3.6 xx 10^(-5) T and radius of the coil is 10cm , find the number of turns in the coil.

In a tangent galvanometer a deflection of 30^(@) is obtained wth a certain current flowing through the coil. If the current is tripled, the deflection obtained will be

A moving coil galvanometer shows deflection of 100 divisions when 20 A current is passed through it.If resistance of galvanometer coil is 50ohm ,then find voltage sensitivity of galvanometer.

A moving coil galvanometer gives full scale defection when a current of 0.05 A is passed through its coil it is converted in to a voltmeter reading up to 5V by using an external resistance of 975 omega what is the resistance of the galvanometer coil ?

A coil al a moving Coil galvanometer twists through 90^@ when a current of one microampere is passed through it. If the area of the coil is 10^-4 m^2 and it has 100 turns, calculate the magnetic field of the magnet of the galvanometer. Given, k = 10^-8N -m /degree.

A galvanometer shows full scale deflection when a current of 1 mA is passed through it . The resistance of the coil used in galvanometer is 100 Omega How will you convert it into an ammeter which should be able to measure the current up to 5 A ?

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 rectangular coil of 100 turns each of area 10 cm^2 hangs freely in radial magnetic field. The coil deflects through an angle of 30^@ when current of 0.5 m A is paased through it . If torsional constant of suspension fibre is 2.5 xx10^-9 Nm/rad, then magnetic field will be ,

A galvanometer with a coil of resistance 50 Omega shows full-scale deflection when 10 mA current passes through it.