The resistance of the meter bridge AB in given figure is 4Ω. With a c – InterviewSolution

1.	The resistance of the meter bridge AB in given figure is 4Ω. With a cell of emf E=0.5 V and rheostat resistance Rh=2Ω the null point is obtained at some point J. When the cell is replaced by another one of emf E=E2 the same null point J is found for Rh=6Ω. The emf E2 is:
Answer» The resistance of the meter bridge $A B$ in given figure is $4 Ω$ . With a cell of emf $E = 0.5 V$ and rheostat resistance $R_{h} = 2 Ω$ the null point is obtained at some point $J$ . When the cell is replaced by another one of emf $E = E_{2}$ the same null point $J$ is found for $R_{h} = 6 Ω$ . The emf $E_{2}$ is:

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