Properties of Solids & Liquids (NEET Physics): Questions 116 - 119 of 188

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Question number: 116

» Properties of Solids & Liquids » Young's Modulus

MCQ▾

Question

Which of the following relations are false

(1) 3Y=K(1σ)

(2) σ=(6K+η)Y

(3) K=9ηYY+η

(4) σ=0.5Yηη

Select the correct answers and mark it according to the following codes:

Choices

Choice (4) Response
a.

1 and 3 are correct

b.

1, 2 and 3 are correct

c.

2 and 4 are correct

d.

1 and 2 are correct

Question number: 117

» Properties of Solids & Liquids » Stress-Strain Relationship

MCQ▾

Question

A brass rod is to support a load of 800 N. If it’s elastic limit is 8.0xl0 8 N/m 2 its minimum diameter must be -

Choices

Choice (4) Response
a.

3.71 mm

b.

1.13 mm

c.

1.59 mm

d.

4.52 mm

Question number: 118

» Properties of Solids & Liquids » Thermal Expansion

Assertion-Reason▾

Assertion (Ꭺ)

A brass disc is just fitted in a hole in a steel plate. The system must be cooled to loosen the disc from the hole.

Reason (Ꭱ)

The coefficient of linear expansion for brass is greater than the coefficient of linear expansion for steel.

Choices

Choice (4) Response
a. Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ
b. Ꭺ is true but Ꭱ is false
c. Both Ꭺ and Ꭱ are false
d. Ꭺ is false but Ꭱ is true

Question number: 119

» Properties of Solids & Liquids » Thermal Expansion

MCQ▾

Question

A rod of length 20 cm is made of metal. It expands by 0.080 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 0.040 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 0.050 cm for the same change in temperature. The portion made of metal A has the length

Choices

Choice (4) Response
a.

8 cm

b.

3 cm

c.

1 cm

d.

5 cm

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