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  • physical quantity P depends on other two physical quantities Q and R , as follows P = a Q^2 R^{1/2} Where a is constant . In an experimen

A physical quantity p depends on the other two physical quantities Q and R, as follows P = a Q ^2 R^{ 1/2} Where a is constant. In an experiment, the quantity Q is determined by measuring P and R and using The above expression. If the percentage of error in measurement of P and R is 10 % and 12 % respectively, Then the % age of error in determines the value of Q is

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Given P = a Q ^2 R^{ 1/2}

Q=\frac{P^\frac{1}{2}}{aR^\frac{1}{4}}

Q \Rightarrow \frac{\Delta Q}{Q} *100=\frac{10}{2}+\frac{12}{4}=8

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