Consider the relation:
Consider an unknown dry cell for which a potentiometer is balanced when the variable resistance is Rx = 1.7 Ω, while an alkaline standard cell with an emf of 1.2 V requires RS = 1.25 Ω to balance the potentiometer.
ES = 1.2 V
RX = 1.7 Ω
RS = 1.25 Ω
Calculate the emf of the dry cell, in volts
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