In the experiment of calibration of voltmeter a standard cell of e m f 1...
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In the experiment of calibration of voltmeter a standard cell of e m f 1 1 Volt is balanced against 440 cm of potentiometer wire The potential 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 The error in the reading of voltmeter will be 1 0 15 volt 3 0 5 volt 2 0 15 volt 4 0 05 volt
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