The percentage error in measuring the voltage across a resistor r by a voltmeter of resistance r is
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Percentage error = [(E - V)/E] x 100%
= (v/E)x100%
= [r/(R+r)] x 100% (as v = Er/(R+r))
=(4/504) x 100%
≈ 0.8%
= (v/E)x100%
= [r/(R+r)] x 100% (as v = Er/(R+r))
=(4/504) x 100%
≈ 0.8%
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