Question

If the percentage error in the measurement of voltage is 5% and that in current 2% ,then what is tha percentage error in power

Answer 1

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Answer 2

According to Ohm's law,

V = IR

Where R is resistance of wirr, I is current flows through wire, V is voltage or potential difference.

For finding error in R, we have, AR/R = A1/1 +AVN Means, % error in R=% error in I+% error in V

Here given, % error in 1 = 2% % error in V = 3 %

:: % error in R = 2% + 3% = 5%

Here, answer is 5%

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