Properties of Solids & Liquids (NEET (National Eligibility cum Medical Entrance Test) Physics): Questions 148 - 152 of 190

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Question number: 148

» Properties of Solids & Liquids » Young's Modulus

MCQ▾

Question

A stress of 2 kg/mm 2 is applied on a wire. If the modulus of elasticity of the wire is 10 10 dyne/cm 2, then the percentage increase in the length of the wire will be

Choices

Choice (4) Response

a.

0.0098

b.

0.007

c.

0.0028

d.

0.0196

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Question number: 149

» Properties of Solids & Liquids » Elastic Behavior

Assertion-Reason▾

Assertion (Ꭺ)

The bridges declared unsafe after a long use.

Reason (Ꭱ)

Elastic strength of bridges losses with time.

Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are false

b.

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

c.

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

d.

Ꭺ is true but Ꭱ is false

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Question number: 150

» Properties of Solids & Liquids » Thermal Expansion

MCQ▾

Question

The temperature of equal masses of three different liquids A, B and C are 12°C, 19 0 C and 28°C respectively. The temperature when A and B are mixed is 16°C and who and C are mixed is 23 0 C. The temperature when A and C are mixed is

Choices

Choice (4) Response

a.

25.2°C

b.

22°C

c.

20.2°C

d.

18.2°C

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Question number: 151

» Properties of Solids & Liquids » Young's Modulus

MCQ▾

Question

A steel wire is 4.0 m long and 2 mm in diameter. Young’s modulus of steel is 1.96 x 10 11 N/m 2. If a mass of 20 kg is suspended from it the elongation produced will be -

Choices

Choice (4) Response

a.

0.64 mm

b.

127 mm

c.

2.54 mm

d.

0.27 mm

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Question number: 152

» Properties of Solids & Liquids » Specific Heat Capacity

MCQ▾

Question

A beaker contains 200 gm of water. The heat capacity the beaker is equal to that of 20 gm of water. The initial temperature of water in the beaker is 20°C. If 440 gm hot water at 92°C is poured in it, the final temperature (neglecting radiation loss) will be nearest to

Choices

Choice (4) Response

a.

68°C

b.

73°C

c.

58°C

d.

78°C

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