The potential difference across a resistor is measured to be V = ( 8 ± 0.5 ) V and the current through it is measured to be I = ( 2 ± 0.2 ) A , then the value of the resistance R is

Question

The potential difference across a resistor is measured to be V = ( 8 ± 0.5 ) V and the current through it is measured to be I = ( 2 ± 0.2 ) A , then the value of the resistance R is, 4 ± 16.25 %, 4 ± 6.25 %, 4 ± 10 %, 4 ± 8 %

MARKS App · Accepted Answer

V = ( 8 + 0.5 ) I = ( 2 + 0.2 ) R = 8 2 = 4 ∆ R R % = ∆ V V + ∆ I I = 0.5 8 + 0.2 2 × 100 = 16.25 % ∴ R = ( 4 ± 16.25 % )

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