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▾

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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