Meter Bridge

Chapter-3|Current Electricity| NCERT 12th Physics:

Meter Bridge:

It is a electrical instrument. It measured the value of unknown resistance. It works on the principle of wheatstone bridge.

 

Wire of length 1 m=100 cm and uniform cross section area A. Wire must be so that it is temperature independence (does not increase resistance after increasing temperature).

Null Point:

We will find out null point D by moving Jockey, until Galvanometer does not show any movement.

Point D -: Where G shows no deflection.

→No current in branch CD.

 Now, It work like balanced wheatstone Bridge.

 

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