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 . How much resistance is to be connected in series with the potentiometer wire to have a potential gradient of
detailed solution
Correct option is C
ε=2V,l=100cm Rp=5ΩV/L=0.05mV/cmVL=ERP+RSRPLSubstituting and solving RS−1995ΩTalk to our academic expert!
Similar Questions
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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