Current Electricity and Electrical InstrumentEasy
Question
A potentiometer wire of 10 m length and having a resistance of 1 ohm/m is connected to an accumulator of emf 2.2 volt and a high resistance box. To obtain a potential gradient of 2.2mV/m, the value of resistance used from the resistance box is :-
Options
A.790 ohm
B.810 ohm
C.990 ohm
D.1000 ohm
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