# The Combined Resistance of a Galvanometer of Resistance 500Ω and Its Shunt is 21Ω. Calculate the Value of Shunt - Physics

The combined resistance of a galvanometer of resistance 500Ω and its shunt is 21Ω. Calculate the value of shunt.

#### Solution

Here, G = 500Ω and Req = 21Ω

1/R_(eq)=1/G+1/S

therefore 1/S=1/R_(eq)-1/G=(G-R_(eq))/(GxxR_(eq)

therefore S=(GxxR_(eq))/(G-R_(eq)

therefore S=(500xx21)/(500-21)=10500/479

therefore S= 21.92 Omega

Concept: Moving Coil Galvanometer
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