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A physical quantitiy X is related to four measurable quantities, a,b,c and d as give `X=a^(2)b^(3)c^(5//2)d^(-2)`. The percentage error in the measurement of `a,b,c` and d are 1%,2%,2% and 4% respectively. What is the percentage error in quantitiy X?A. 0.15B. 0.17C. 0.21D. 0.23 |
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Answer» Correct Answer - C As `X=a^(2)b^(3)c^(5//2)d^(-2)` the percentage error in X is `(DeltaX)/(X)xx100=[2((Deltaa)/(a))+3((Deltab)/(b))+(5)/(2)((Deltac)/(c))+2((Deltad)/(d))]xx100` `=2xx1%+3xx2%+(5)/(2)xx2%+2xx4%=21%` |
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