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.
