The potentiometer wire of length 800cm has a resistance of 40Ω.It is connected in series with a resistance of 10Ω and an accumulator of emf 2V having negligible resistance. A source of 1.5V is balanced against a length L of potentiometer wire. Find the value of L.
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Required potential gradient= 1 mV cm-1 So potential difference across potentiometer wire In the circuit, potential difference across 8 Ω.
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