In an experiment of calibartion of voltmeter, a standard cell of emf `1.1 V` is balanced against `
Channel: Doubtnut
Date: 30/08/2020

In an experiment of calibartion of voltmeter, a standard cell of emf `1.1 V` is balanced against `440 cm` of potentiometer wire. The potentilal difference across the ends of a resistance is found  to balance against `220 cm` of the wire. The corresponding reading of voltmeter is 0.5 volt. Find the error in the reading of voltmeter.