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In a potentiometer, a standard cell of e...

In a potentiometer, a standard cell of emf `5V` and of negligible resistance maintains a steady current through the galvanometer wire of length `5 m`. Two primary cells of emfs `epsilon_(1) and epsilon_(2)` are joined in series with (i) same polarity and (ii) apposite polarity.The combination is connected through it galvanometer and a joined to the potentiometer. The balancing length is the two cases are found to be `350 cm` and 50 cm` respectively
(i) Draw the necessary circuit diagram
(ii) Find the value of emfs of the two cells

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