Properties of Solids & Liquids (NEET Physics): Questions 87 - 90 of 188

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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

Question number: 89

» Properties of Solids & Liquids » Hooke's Law

MCQ▾

Question

A wire of length l m and area of cross section 4 × 10 -8 m 2 increases in length by 0.4 cm when a force of 14 N is applied. Value of Y for the material of the wire will be

Choices

Choice (4) Response
a.

7.23 × 10 11 kg/m 2

b.

2.56 × 10 11 N/m 2

c.

2.46 × l0 11 N/mm 2

d.

8.75 × l0 6 N/m 2

Question number: 90

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

MCQ▾

Question

A thin metal disc of radius r floats on water surface and bends the surface downwards along the perimeter making an angle 9 with vertical edge of the disc. If the disc displaces a weight of water W and surface tension of water is T, then the weight of metal disc is

Choices

Choice (4) Response
a.

W2πrTcosθ

b.

2πrTcosθW

c.

2πrT+W

d.

2πrTcosθ+W

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