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e potential difference across a resistor ‘r’ carrying current ‘I’ is Ir. (3) (i) Now if the potential difference across ‘r’ is measured using a voltmeter of resistance ‘Rv’, show that the reading of voltmeter is less than the true value. (ii) Find the percentage error in measuring the potential difference by a voltmeter. (iii) At what value of Rv, does the voltmeter measures the true potential difference?

    • Posted by K V 6 years, 9 months ago

    CBSE > Class 12 > Physics
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