NEET Physics Current Electricity Questions Solved

The potential difference across a resistor ‘r’ carrying current ‘I’ is Ir.


(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?

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