Questions
The e.m.f. of the driver cell of a potentiometer is 2V and its internal resistance is negligible. The length of the potentiometer wire is 100 cm and resistance is 5 ohms. How much resistance is to be connected in series with the potentiometer wire to have a potential gradient of 0.05 ?
detailed solution
Correct option is C
potential gradient =iRPL=E RPLRs+RP=0.05 x10-310-2 V/m 2 x 51Rs+5= 5 x 10-3 Rs=1995Talk to our academic expert!
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A cell of resistance and emf 10 volt is connected to a uniform wire of length 500 cm and resistance 3 ohm. The potential gradient in the wire is
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