Answer
391.5k+ views
Hint:First of all, we will express the percentage errors into its respective expressions. After that we will expand the expression as given in the question. The powers raised to the observables will get multiplied while finding the percentage error of the whole expression.
Formula used:
In this question we have to find the percentage error of the quantity P, so you know the percentage error expression.
Relative error is the ratio of the mean absolute error to the mean value.
Relative Error =\[\dfrac{\Delta x}{x}\] (Multiply by 100 to get percentage error)
Percentage Error \[=\dfrac{\Delta x}{x}\times 100=\] Relative error \[\times 100\]
Complete step by step solution:
Given Data
Percentages Errors of a
\[\dfrac{\Delta a}{a}\times 100=1%\]
Percentages Errors of b
\[\dfrac{\Delta b}{b}\times 100=3%\]
Percentages Errors of c
\[\dfrac{\Delta c}{c}\times 100=4%\]
Percentages Errors of d
\[\dfrac{\Delta d}{d}\times 100=2%\]
Given Equations
\[P=\dfrac{{{a}^{3}}{{b}^{2}}}{\sqrt{c}d}\]
Expression of Error in Multiplication
If \[x=ab\]
Then the percentage error of x is
\[\dfrac{\Delta x}{x}\times 100=\left( \dfrac{\Delta a}{a}\times 100 \right)+\left( \dfrac{\Delta b}{b}\times 100 \right)\]
Expression of Error in Division
\[x=\dfrac{a}{b}\]
Then the percentage error of x is
\[\dfrac{\Delta x}{x}\times 100=\left( \dfrac{\Delta a}{a}\times 100 \right)+\left( \dfrac{\Delta b}{b}\times 100 \right)\]
Expression of Errors in exponent
\[x=a{{b}^{n}}\]
Then the percentage error of x is
\[\dfrac{\Delta x}{x}\times 100=\left( \dfrac{\Delta a}{a}\times 100 \right)+n\left( \dfrac{\Delta b}{b}\times 100 \right)\]
To find out the percentages error in the quantity of P is
\[
\dfrac{\Delta p}{p}\times 100=3\left( \dfrac{\Delta a}{a}\times 100 \right)+2\left( \dfrac{\Delta b}{b}\times 100 \right)+\dfrac{1}{2}\left( \dfrac{\Delta c}{c}\times 100 \right)+\left( \dfrac{\Delta d}{d}\times 100 \right) \\
\Rightarrow\dfrac{\Delta p}{p} \times 100=3 (1\%)+2(3\%)+\dfrac{1}{2}(4\%)+2\% \\
\therefore\dfrac{\Delta p}{p}\times 100=13\% \\
\]
The percentage error in the quantity of P is 13%.The value of P is given in question is 3.763. By rounding this value to the first decimal place, we get 3.8.
Note:While solving this problem, most of the students tend to make mistakes while finding the overall percentage of the given expression. In most of the cases it is seen that the students forget to multiply the powers raised to the observables. Again, it is important to note that while rounding off, if the succeeding digit is less than 5 then its preceding digit remains the same.
Formula used:
In this question we have to find the percentage error of the quantity P, so you know the percentage error expression.
Relative error is the ratio of the mean absolute error to the mean value.
Relative Error =\[\dfrac{\Delta x}{x}\] (Multiply by 100 to get percentage error)
Percentage Error \[=\dfrac{\Delta x}{x}\times 100=\] Relative error \[\times 100\]
Complete step by step solution:
Given Data
Percentages Errors of a
\[\dfrac{\Delta a}{a}\times 100=1%\]
Percentages Errors of b
\[\dfrac{\Delta b}{b}\times 100=3%\]
Percentages Errors of c
\[\dfrac{\Delta c}{c}\times 100=4%\]
Percentages Errors of d
\[\dfrac{\Delta d}{d}\times 100=2%\]
Given Equations
\[P=\dfrac{{{a}^{3}}{{b}^{2}}}{\sqrt{c}d}\]
Expression of Error in Multiplication
If \[x=ab\]
Then the percentage error of x is
\[\dfrac{\Delta x}{x}\times 100=\left( \dfrac{\Delta a}{a}\times 100 \right)+\left( \dfrac{\Delta b}{b}\times 100 \right)\]
Expression of Error in Division
\[x=\dfrac{a}{b}\]
Then the percentage error of x is
\[\dfrac{\Delta x}{x}\times 100=\left( \dfrac{\Delta a}{a}\times 100 \right)+\left( \dfrac{\Delta b}{b}\times 100 \right)\]
Expression of Errors in exponent
\[x=a{{b}^{n}}\]
Then the percentage error of x is
\[\dfrac{\Delta x}{x}\times 100=\left( \dfrac{\Delta a}{a}\times 100 \right)+n\left( \dfrac{\Delta b}{b}\times 100 \right)\]
To find out the percentages error in the quantity of P is
\[
\dfrac{\Delta p}{p}\times 100=3\left( \dfrac{\Delta a}{a}\times 100 \right)+2\left( \dfrac{\Delta b}{b}\times 100 \right)+\dfrac{1}{2}\left( \dfrac{\Delta c}{c}\times 100 \right)+\left( \dfrac{\Delta d}{d}\times 100 \right) \\
\Rightarrow\dfrac{\Delta p}{p} \times 100=3 (1\%)+2(3\%)+\dfrac{1}{2}(4\%)+2\% \\
\therefore\dfrac{\Delta p}{p}\times 100=13\% \\
\]
The percentage error in the quantity of P is 13%.The value of P is given in question is 3.763. By rounding this value to the first decimal place, we get 3.8.
Note:While solving this problem, most of the students tend to make mistakes while finding the overall percentage of the given expression. In most of the cases it is seen that the students forget to multiply the powers raised to the observables. Again, it is important to note that while rounding off, if the succeeding digit is less than 5 then its preceding digit remains the same.
Recently Updated Pages
In a flask the weight ratio of CH4g and SO2g at 298 class 11 chemistry CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
In a flask colourless N2O4 is in equilibrium with brown class 11 chemistry CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
In a first order reaction the concentration of the class 11 chemistry CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
In a first order reaction the concentration of the class 11 chemistry CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
In a fermentation tank molasses solution is mixed with class 11 chemistry CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
In a face centred cubic unit cell what is the volume class 11 chemistry CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Trending doubts
Which are the Top 10 Largest Countries of the World?
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Difference Between Plant Cell and Animal Cell
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Give 10 examples for herbs , shrubs , climbers , creepers
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Write a letter to the principal requesting him to grant class 10 english CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
What is the full form of AD a After death b Anno domini class 6 social science CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Change the following sentences into negative and interrogative class 10 english CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Name 10 Living and Non living things class 9 biology CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)