Properties of Solids & Liquids (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 84 - 88 of 190

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Question number: 84

» Properties of Solids & Liquids » Thermal Expansion

MCQ▾

Question

A rod of length 20 cm is made of metal. It expands by 0.075 cm when its temperature is raised from 0°C to 100°C. Another rod of a different metal B having the same length expands by 0.045 cm for the same change in temperature. A third rod of the same length is composed of two parts, one of metal A and the other of metal B. This rod expands by 0.060 cm for the same change in temperature. The portion made of metal A has the length

Choices

Choice (4) Response

a.

10 cm

b.

15 cm

c.

18 cm

d.

20 cm

Question number: 85

» Properties of Solids & Liquids » Modulus of Rigidity

MCQ▾

Question

The compressibility of water is 5 × 10 -10 m 2 /N. If it is subjected to a pressure of 20 MPa the fractional decrease in volume will be -

Choices

Choice (4) Response

a.

7.5 ×10 -3

b.

5.0 × 10 -3

c.

1.5 × 10 -2

d.

3.3 × 10 -5

Question number: 86

» Properties of Solids & Liquids » Thermal Expansion

MCQ▾

Question

Density of a substance at 0°C is 10 gm/cc and at 100°C, its density is 9.7 gm/cc. The coefficient of linear expansion of the substance will be

Choices

Choice (4) Response

a.

10 2

b.

10 -3

c.

10 -4

d.

10 -2

Question number: 87

» Properties of Solids & Liquids » Thermal Expansion

MCQ▾

Question

A constant volume gas thermometer shows pressure reading of 40 cm and 90 cm of mercury at 0°C and 100°C respectively. When the pressure reading is 80 cm of mercury, the temperature is

Choices

Choice (4) Response

a.

12.5°C

b.

40°C

c.

80°C

d.

15°C

Question number: 88

» Properties of Solids & Liquids » Elastic Behavior

Assertion-Reason▾

Question

Assertion (Ꭺ)

Bulk modulus of elasticity (K) represents incompressibility of the material.

Reason (Ꭱ)

Bulk modulus of elasticity is proportional to change in pressure.

Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

b.

Ꭺ is false but Ꭱ is true

c.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

d.

Both Ꭺ and Ꭱ are false

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