Current Electricity and Electrical InstrumentEasy
Question
Potentiometer wire length is 10 m, having a total resistance of 10Ω. If a battery of emf 2 volt (negligible internal resistance) and a rheostat is connected to it then potential gradient is 20mV/m find the resistance applied through rheostat : -
Options
A.90 Ω
B.990 Ω
C.40 Ω
D.190 Ω
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