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Surface Tension 1

Authored by Dr A

Physics

University

Used 29+ times

Surface Tension 1
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10 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 10 pts

If the surface of a liquid is plane, then the angle of contact of the liquid with the walls of the container is

900

00

Acute angle

Obtuse angle

2.

MULTIPLE CHOICE QUESTION

1 min • 10 pts

Which of the following is not an effect of surface tension

Capillary rise

Spherical shape of water drops

Spiders skirting on water

Cylindrical shape of water drops

3.

MULTIPLE CHOICE QUESTION

1 min • 10 pts

A soap bubble contains two surface layers. What is the excess pressure just inside the first layer when seen from outside the bubble?

S/R

2S/R

4S/R

S/2R

4.

MULTIPLE CHOICE QUESTION

1 min • 10 pts

The Unit of surface tension is

Nm

5.

MULTIPLE CHOICE QUESTION

1 min • 10 pts

Which has an obtuse angle of contact

Mercury

Water

Suplpuric acid

Oil

6.

MULTIPLE CHOICE QUESTION

3 mins • 10 pts

A mercury drop of radius 1 cm is broken into 106 droplets of equal size. The work done is

4.35 × 10-2

4.35 × 10-3 J

4.35 × 10-6

4.35 × 10-8 J

7.

MULTIPLE CHOICE QUESTION

2 mins • 10 pts

The energy needed in breaking a drop of radius R into n drops of radius r is

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