Properties of Solids & Liquids-Surface Energy and Surface Tension (NEET Physics): Questions 20 - 23 of 23

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Question number: 20

» Properties of Solids & Liquids » Surface Energy and Surface Tension

MCQ▾

Question

The radii of two soap bubbles are r 1 and r 2. In isothermal conditions, two meet together in vacuum. Then the radius R of the resultant bubble is given by

Choices

Choice (4) Response

a.

R=r1+r2

b.

R=r1+r22

c.

R2=r12+r22

d.

R=r1(r1r2+r2)

Question number: 21

» Properties of Solids & Liquids » Surface Energy and Surface Tension

MCQ▾

Question

When a body falls in air, the resistance of air depends to a rate extent on the shape of the body, 3 different shapes disc, ball and cigar shape. Identify the combination of air resistances which truly represents the physical situation. (The cross sectional areas are the same).

Choices

Choice (4) Response

a.

2 < 3 < 1

b.

3 < 1 < 2

c.

3 < 2 < 1

d.

1 < 2 < 3

Question number: 22

» Properties of Solids & Liquids » Surface Energy and Surface Tension

MCQ▾

Question

A homogeneous solid cylinder of length L (L<H2) and cross-sectional area A4 is immersed such that it floats with its axis vertical at the liquid-liquid interface with length L4 in the denser liquid as shown in the fig. The lower density liquid is open to atmosphere having pressure P Q. Then density of solid is given by

homogeneous solid cylinder in liquid with length L/4

Homogeneous Solid Cylinder in Liquid With Length L/4

Here in above fig we show that homogenous cylinder of length in liquid phase interface with length L/4.

Choices

Choice (4) Response

a.

Dd

b.

D=d

c.

D<d

d.

D>d

Question number: 23

» Properties of Solids & Liquids » Surface Energy and Surface Tension

Appeared in Year: 2016

MCQ▾

Question

A rectangular film of liquid is extended from (4cm×2cm) to (5cm×4cm) . If the work done is 3×104J , the value of the surface tension of the liquid is –

Choices

Choice (4) Response

a.

8.0Nm

b.

0.125Nm

c.

0.250Nm

d.

0.2Nm

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