Question

Write any three factors on which the voltage sensitivity of a moving coil galvanometer depends.

Answer 1

Hy here is the Answer......

• The strength of the magnetic field through which the coil is rotating, the number of turns in that coil, and the relative "stiffness" of the spring resisting the rotation are all factors influencing the ratio of the rotation angle to the coil current.

Answer 2

Answer with Explanation:

Sensitivity of galvanometer:A galvanometer is said to be sensitive when it gives large deflection when small current is passed through  it or small voltage applied across it.

Voltage sensitivity of galvanometer:It is defined as the deflection produced in the galvanometer when a unit voltage is  applied across  two terminals.

Voltage sensitivity=$\frac{NBA}{RK}$

Where N=Number of turns

A=Area of coil

B=Magnetic field produced in coil

K=Torsion constant of galvanometer

R=Resistance of galvanometer

Voltage sensitivity of a moving coil galvanometer is directly proportional to area of coil.

It is inversely proportional to torsion constant of galvanometer coil

It is directly proportional to magnetic field .

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