Ammeter From Galvanometer
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Description:
A galvanometer can be used as a device to measure the current flowing through a circuit known as Ammeter. As galvanometer can only measure a small amount of electric current we need to use a shunt to measure large value of current.
Shunt
Shunt is a low resistance placed parallel to the galvanometer coil. The excess current that cannot be measured by the galvanometer coil is passed through the shunt.
υ = S(i - ig) = G ig
Equation of ammeter is –
S(i - ig) = G ig
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