I am having a lot pf problem to attempt this question, please help me, i am stuck..!!!!!!(adsbygoogle = window.adsbygoogle || []).push({});

The power loss P in a resistor is calculated using the formula p=v^2/R

The uncertainty in the potential difference V is 3% and the uncertainty in the resistance R is 2%. What is the Uncertainty in P?

A/ 4%

B/ 7%

C/ 8%

D/ 11%

Hmmm My attempt:

Fractional error = in V, 0.09 and in R 0.2 i subtracted and i got 0.11 that is 11% ANSWER D

And i can be at 98% sure that the answer is not correct as uncertainty cannot be substrate d ..??? please help me to attempt the question !!!!!!!!

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# Homework Help: Uncertainty formula in resistor

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