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Measurements and Instrumentation

Q1: The current passing through a resistance of 100 ± 0.2% Ω is 2 ± 0.5% A. The limiting error in computation of power will be

A ± 0.7%

B ± 0.9%

C ± 1.2%

D ± 0.3%

ANS:C - ± 1.2%

Limiting error = 2 x 0.5 + 0.2 = ± 1.2% (we have to take 2 x 0.5 because power ∝ I2).



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