A potentiometer wire of length \( 100 \mathrm{~cm} \) has a resistance of \( 10 \mathrm{ohm} \).... VIDEO
A potentiometer wire of length \( 100 \mathrm{~cm} \) has a resistance of \( 10 \mathrm{ohm} \). It is connected in series with a resistance and an accumulator of emf \( 2 \mathrm{~V} \) and of negligible internal resistance. A source of emf of \( 10 \mathrm{mV} \) is balanced against a length of \( 40 \mathrm{~cm} \) of the potentiometer wire. What is the value of external resistance?https://bit.ly/YTAI_PWAP https://www.pw.live
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