Numerical - Calculate maximum possible percentage error in resistance, given maximum possible percentage error in voltmeter & ammeter

Q.  While measuring resistance by the voltmeter - ammeter method, the maximum possible percentage error in the voltmeter and ammeter are ± 1.8% and ± 1.2% respectively. Then the maximum possible percentage error in the value of resistance will be
- Published on 16 Sep 15

a. ± 3%
b. ± 4%
c. ± 4.2%
d. ± 4.8%

ANSWER: ± 3%

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