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potensial meter (explaination (theory (wire is made of constantan and…

- - - - Cell E and Internal resistance connected with potenaial metere
      - Close key k Adjust Rh so constant current flows
        Find point C on wire by jockey so g show zero deflection
      - AC=l1
      - ,key k1 ,Rhiostat Rh ,ameter A ,battery E ,Galvanometer G
      - E=kl1
      - Now close k1 adjust balance point R at length r2 v be potensial difference
  - - - E1 and E2 can be compared by using of circuit
      - CLOSE KEY k and aDJUST RHIOSTAT so constant current passing throgh potensio meter wire
      - E1 comes in contact with circuit
      - now close gap 1and3
      - slide jockey J FIND Balance point C where galvaometer shows zerop deflection
      - AC=l
      - E1=Kl1
    - - E1=kl1
      - E2=Kl2
    - - E1 E2 conneted with p meter key k1 /rhiostat rh/ ameter a/ batery E /Galvanovanometer G / two way key /jockey J