Mechanical Properties of Fluids Test

Directions For Questions

The charge of an electron was first measured by the American physicist Robert Millikan during 1909-1913. In his experiment, oil was sprayed in very fine drops (around $$10^{-4}$$ mm in diameter) into the space between two parallel horizontal plates separated by a distance $$d$$. A potential difference $$V_{AB}$$ is maintained between the parallel plates, causing a downward electric field between them. Some of the oil drops acquire a negative charge because of frictional effects or because of ionisation of the surrounding air by X-rays or radioactivity. The drops are observed through microscope. $$\rho$$ is density of oil and $$r$$ is radius of the drop under investigation.

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Mechanical Prop...

Question 1

Poiseuille's

Ostwald's

Brewester's

Stoke's

Question 2

Question 3

0.14 m/s

1.4 m/s

0.014 m/s

14 m/s

Question 4

$$347$$

$$34.7$$

$$3470$$

$$0.347$$

Question 5

$$0.2$$

$$2$$

$$20$$

$$200$$

Question 6

$$10 cm$$

$$10 \sqrt2 cm$$

$$\displaystyle \dfrac {10}{\sqrt2}$$

none of these

Question 7

The speed of the particle always remains same

The velocity of the particle always remains same

The kinetic energies of all the particles arriving at a given point are same

The momenta of all the particles arriving at the given point are same

Question 8

$$\displaystyle \frac {\sqrt 3 H}{2}$$

$$\displaystyle \frac {2H}{\sqrt 3}$$

$$\displaystyle \frac {H}{\sqrt 3}$$

$$\sqrt 3 H$$

Question 9

turbulent

rapid

viscous

streamlined

Question 10

$$5 \times 2 cms^{-1}$$

$$5 \times \sqrt 2 cms^{-1}$$

$$5 \times (4)^{\frac {1}{3}} cms^{-1}$$

$$\displaystyle \frac {5}{\sqrt 2} cms^{-1}$$

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