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A rectangular coil of a moving coil galvanometer contains 50 turns each having area 12 cm2 . It is suspended in radial magnetic field 0.025 Wb/m^{2} by a fibre of twist constant 15 x10^{-10} Nm/degree. Calculate the sensitivity of the moving coil galvanometer.

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#### Solution

Given:-

N = 50, A = 12 cm^{2} = 12 x 10^{-4} m^{2},

B = 0.025 Wb/m^{2},

C = 15 x 10^{-10} Nm/degree

To find:- Sensitivity (S_{i})

Formula: S_{i} = NAB/C

Calculation: From formula,

`S_i=(50xx12xx10^-4xx0.025)/(15xx10^-10`

`thereforeS_i=10^6"div/A"`

**The sensitivity of a moving coil galvanometer is 10 ^{6} div/A.**

Concept: Moving Coil Galvanometer

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