Question

A potentiometer has a resistance wire of 4 m length and resistance 4 ohm, a cell of emf 12 V is connected across the Wire. If cells having emfs E1 = 2V and E2 = 4VE and internal resistance r1 = 2 ohm and r2 = 6 ohm are connected as shown in figure, then null deflection on length AN, is?​

Answer 1

Answer:

I didn't understand what is this question

Answer 2

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