InterviewSolution
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InterviewSolution
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A wire has a mass `0.3+-0.003g`, radius `0.5+-0.005mm` and length `6+-0.06cm`. The maximum percentage error in the measurement of its density isA. `1`B. `2`C. `3`D. `4` |
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Answer» Correct Answer - d Density , `rho= (M)/(V) = (M)/(pui r^(2)L)` `rArr (Delta rho)/(rho) =(Delta M)/(M) + 2 (Delta r)/(r ) + (Delta L)/(L)` ` = (0.003)/(0.3)+ 2 xx (0.005)/(0.5) + (0.06)/(6)` `= 0.01 + 0.02 + 0.01 = 0.04` `:.` Perecentage error `= (Delta rho)/(rho) xx 100 = 0.04 xx 100 = 4%` |
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