Categories > Current Electricity > Different Measuring Instruments > AB is a potentiometer wire of length 100 cm and its resistance is 10 ohms. It is connected in series with a resistance R = 40 ohms and a battery of e.m.f. 2 V and negligible internal resistance. If a source of unknown e.m.f.E is balanced by 40 cm length of the potentiometer wire, the value of E is

Current Electricity

Question: AB is a potentiometer wire of length 100 cm and its resistance is 10 ohms. It is connected in series with a resistance R = 40 ohms and a battery of e.m.f. 2 V and negligible internal resistance. If a source of unknown e.m.f.E is balanced by 40 cm length of the potentiometer wire, the value of E is

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1) 0.8 V
2) 1.6 V
3) 0.08 V
4) 0.16 V
Solution: Explanation: No Explanation
Different Measuring Instruments Potentiometer Meter Bridge

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