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प्रश्न
Draw a labelled circuit diagram of a potentiometer to compare emfs of two cells. Write the working formula (Derivation not required).
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उत्तर
The required circuit diagram is given alongside.
Working formula `"E"_1/"E"_2 = l_1/l_2`
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संबंधित प्रश्न
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Consider a simple circuit shown in figure 
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