Categories > Current Electricity > Different Measuring Instruments > A potentiometer is used for the comparison of e.m.f. of two cells ${E_1}$ and ${E_2}$. For cell ${E_1}$ the no deflection point is obtained at 20$cm$ and for ${E_2}$ the no deflection point is obtained at 30$cm$. The ratio of their e.m.f.'s will be

Current Electricity

Question: A potentiometer is used for the comparison of e.m.f. of two cells ${E_1}$ and ${E_2}$. For cell ${E_1}$ the no deflection point is obtained at 20$cm$ and for ${E_2}$ the no deflection point is obtained at 30$cm$. The ratio of their e.m.f.'s will be


1) 2/3
2) 1/2
3) 1
4) 2
Solution: Explanation: No Explanation
Different Measuring Instruments Potentiometer Meter Bridge

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