Properties of Solids & Liquids-Elastic Behavior (NEET Physics): Questions 11 - 15 of 28

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Question number: 11

» Properties of Solids & Liquids » Elastic Behavior

Assertion-Reason▾

Assertion (Ꭺ)

Steel is more elastic than rubber.

Reason (Ꭱ)

Under given deforming force, steel is deformed less than rubber.

Choices

Choice (4) Response

a.

Ꭺ is true but Ꭱ is false

b.

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

c.

Both Ꭺ and Ꭱ are false

d.

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

Question number: 12

» Properties of Solids & Liquids » Elastic Behavior

MCQ▾

Question

A brass rod is to support a load of 400 N. If its elastic limit is 4.0 × l0 8 N/m 2 its minimum diameter must be -

Choices

Choice (4) Response

a.

2.26mm

b.

1.13mm

c.

4.52mm

d.

3.71mm

Question number: 13

» Properties of Solids & Liquids » Elastic Behavior

MCQ▾

Question

The work done in increasing the length of a one meter long wire of cross-sectional area 1mm 2 through 1mm will be

(Y = 2 × 10 11 N/m 2)

Choices

Choice (4) Response

a.

250 J

b.

5 J

c.

10 J

d.

0.1 J

Question number: 14

» Properties of Solids & Liquids » Elastic Behavior

MCQ▾

Question

A steel wire of uniform cross-sectional area 4 mm 2 is heated up to 60° C and clamped rigidly at two ends. If the temperature of wire falls to 40° C then change in tension in the wire will be, if coefficient of linear expansion of steel is 1.1 x 10 -5 /°C and young’s modulus of elasticity of steel is 2 × 10 -6 N/m 2.

Choices

Choice (4) Response

a.

176 N

b.

188 N

c.

144 N

d.

132 N

Question number: 15

» 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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