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  2. A physical quantity p depends on otehr two physical quantities Q and R , as follows P
# Engineering

A physical quantity p depends on otehr 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 measurment of P and R are 10 % and 12 % respectively , Then the % age of error in determines value of Q is

Answers (1)
S safeer

@Anmol

 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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