Properties of Solids & Liquids (NEET Physics): Questions 167 - 171 of 188

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 2099 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 550.00 or

Question number: 167

» Properties of Solids & Liquids » Elastic Behavior

MCQ▾

Question

A wire of cross sectional area 3 mm 2 is just stretched between two fixed points at a temperature of 20° C. Determine the tension when the temperature falls to 20° C. Coefficient of linear expansion a = 10 -5 °C -1 and Y = 2 × 10 11 N/m 2.

Choices

Choice (4) Response
a.

120 N

b.

102 N

c.

20 N

d.

120 KN

Question number: 168

» 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: 169

» 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: 170

» Properties of Solids & Liquids » Stress-Strain Relationship

MCQ▾

Question

A copper rod 2m long is stretched by 1mm. Strain will be -

Choices

Choice (4) Response
a.

5 × 10 -4, volumetric

b.

5 × 10 -4, longitudinal

c.

10 -4, volumetric

d.

5 × 10 -3, volumetric

Question number: 171

» Properties of Solids & Liquids » Heat Transfer » Conduction

MCQ▾

Question

A 10 cm thick ice block is there on the surface of water in a lake. The temperature of air is - 10° C; how much time it will take to double the thickness of the block (L = 80 cal/g, K ice = 0.004 erg/s-k, ρ ice = 0.92 gm cm -3)

Choices

Choice (4) Response
a.

51.11 hours

b.

21 hour

c.

19.11 hours

d.

191 hours

Sign In