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In determing viscosity (eta) by poiseuil...

In determing viscosity `(eta)` by poiseuille's method for formula used `eta = (pi p r^4)/(8 vl)`. Which of the quantities in the formula must be measured more accurately

A

p

B

r

C

v

D

1

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The correct Answer is:
B
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AAKASH SERIES-UNITS AND MEASUREMENTS-EXERCISE -1 A
  1. Among the following the error that can be eliminated is

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  2. Which of the following time measuring devices is most precise

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  3. In determing viscosity (eta) by poiseuille's method for formula used e...

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  4. The set of quantities which cannot form a group of fundamental qualnti...

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  5. The set of quantities which can form a group of fundamental quantities...

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  6. Boltzman constant and Plank's constant differ in the dimensions of

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  7. The pair of physical quantities having the same dimensions is

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  8. A scalar quantity and a vector quantity haivng the same dimensions are

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  9. The pair of scalar quantities having the same dimensions is

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  10. The pair of vector quantities haivng the same dimensions is

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  11. Intensity of Magnetization has the same dimensions as

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  12. The product of Energy and moment of Inertia has the dimensions same as

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  13. SI unit and CGS unit of certain quantity vary by 10^3 times.That quant...

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  14. Choose the correct statement

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  15. The pair of physical quantities having the same dimensional formula ar...

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  16. The pair of physical quantities having the same dimensional formula

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  17. When 45 g of an unknown compound was dissolved in 500 g of water, the ...

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  18. The pair of physical quantities not having the same dimensional formul...

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  19. The time of oscillation of a small drop of liquid under surface tensio...

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  20. With reference to magnetic dipole, match the tems of Column I with the...

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