What is Ammeter in Physics

What is Ammeter in Physics

 

Introduction:

 

A galvanometer having a low resistance in parallel is called as ammeter. It is used to measure current. The low resistance connected in parallel is called shunt.

 

 

Working:

 

When current is passed through a Galvanometer, its coil is deflected and pointer attached with the coil moves over a Scale. The range for the measurement of current in a galvanometer is very small. Therefore, a low resistance in parallel is used with a galvanometer. This resistance by passes a great part of the current. Only a small amount of current passes through the galvanometer coil, which is within the range of l the galvanometer. This resistance acts as a shunt. An ammeter is always placed in series with other circuit components through which current is to be measured.

 

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