Current Electricity and Electrical InstrumentHard
Question
In fig. battery E is balanced on 55 cm length of potentiometer wire but when a resistance of 10 Ω is connected in parallel with the battery then it balances on 50 cm length of the potentiometer wire then internal resistance r of the battery is: -
Options
A.1 Ω
B.3 Ω
C.10 Ω
D.5 Ω
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