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What is the value of the e.m.f. of a simple cell ?
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Correct option is A. 1.1 V
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Q3
The figure shows a simple potentiometer circuit for measuring a small EMF produced by a thermocouple.
The metre wire PQ has a resistance of 5 Ω and the driver cell has an EMF of 2.00 V. If a balance point is obtained 0.6 m along PQ, when measuring an EMF of 6.00 mV, what is the value of resistance R?
The metre wire PQ has a resistance of 5 Ω and the driver cell has an EMF of 2.00 V. If a balance point is obtained 0.6 m along PQ, when measuring an EMF of 6.00 mV, what is the value of resistance R?
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Q5
As shown in the fig. a simple potentiometer circuit for measuring a small emf produced by a thermocouple. The meter wire PQ has a resistance 5 Ω and the driver cell has an emf of 20011 (f a balance point is obtained 0.600 m along PO when measuring an emf of 6.00 mV, what is the value of resistance R ?
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