1.

Two cells when connected in series are balanced on 8m on a potentiometer. If the cells are connected with polarities of one of the cell is reversed, they balance on 2m. The ratio of e.m.f.'s of the two cells is

A.                    \[3:5\]                             
B.            \[5:3\]
C.                    \[3:4\]                             
D.            \[4:3\]
Answer» C.                    \[3:4\]                             


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