HOW TO CONVERT A GALVANOMETER INTO AN AMMETER?

 
<img src="galvanometer-ammeter.jpg" alt="Circuit diagram showing the conversion of galvanometer into an ammeter">
Conversion of galvanometer into ammeter
<img src="galvanometer-ammeter.jpg" alt="Image showing the description for the conversion of galvanometer into an ammeter">
Conversion of galvanometer into ammeter- description

GALVANOMETER

Galvanometer is a very sensitive Instrument used to detect the flow of current in an electrical circuit.Being a very sensitive instrument a large current can’t be passed through it,as it may damage.When large current  flows, a portion of the current passes through the galvanometer and the remaining larger portion passes through the low resistance.

A GALVANOMETER CAN BE CHANGED INTO AN AMMETER BY CONNECTING A SHUNT WIRE PARALLEL TO IT.

<img src="galvanometer-ammeter.jpg" alt="Image showing the 30-0-30 galvanometer">
Galvanometer -Image

SHUNT

A resistor with a very low resistance connected in parallel with other resistor.Such type of resistor is called shunt resistance.It is made up of a material having  low temperature  coefficient of resistance.

<img src="galvanometer-ammeter.jpg" alt="Diagram showing shunt resistance for the conversion of galvanometer into an ammeter">
Shunt resistance – Image

CONVERSION OF GALVANOMETER INTO AN AMMETER

<img src="galvanometer-ammeter.jpg" alt="Image showing the expression and formula for the  conversion of galvanometer into an ammeter">
Conversion of galvanometer into ammeter-shunt resistance connection

VALUE OF SHUNT RESISTANCE

<img src="galvanometer-ammeter.jpg" alt="Diagram showing the ammeter and the shunt resistance value for the conversion of galvanometer into an ammeter">
Conversion of galvanometer into ammeter-value of shunt resistance

EFFECTIVE RESISTANCE OF AMMETER

<img src="galvanometer-ammeter.jpg" alt="Image showing the  expression for the effective resistance of the  ammeter in the  conversion of galvanometer into an ammeter">
Conversion of galvanometer into ammeter- Effective resistance of ammeter

AMMETER IS CONNECTED IN SERIES

Ammeter  connected in series

 


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