NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1161 - 1164 of 2184

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Question number: 1161

» Properties of Solids & Liquids » Elastic Behavior

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MCQ▾

Question

Length of a wire is doubled, when 15 × 10 8 N/m 2 stress is applied on it. Its Young’s modulus of elasticity in N/m 2 will be

Choices

Choice (4) Response

a.

15 × 10 8

b.

10 × 10 8

c.

20 × 10 8

d.

25 × 10 10

Question number: 1162

» Properties of Solids & Liquids » Thermal Expansion

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MCQ▾

Question

A piece of metal weight 46 gm in air, when it is immersed in the liquid of specific gravity 1.24 at 27 °C it weighs 30 gm. When the temperature of liquid is raised to 42°C the metal piece weighs 30.5 gm, specific gravity of the liquid at 42°C is 1.20, then the linear expansion of the metal will be

Choices

Choice (4) Response

a.

4.316 × 10 -5 /°C

b.

3.316 × 10 -5 /°C

c.

2.316 × 10 -5 / o C

d.

None of the above

Question number: 1163

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

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MCQ▾

Question

Two parallel glass plates are dipped partly in the liquid of density ρ keeping them vertical. If the distance between the plates is V, surface tension for liquids is T and angle of contact is θ, then rise of liquid between the plates due to capillary will be

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 1164

» Wave Optics » Polarization

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Assertion-Reason▾

Question

Assertion (Ꭺ)

A Nicol prism can produce polarised light. It can also analyses plane polarised light.

Reason (Ꭱ)

Nicol prism reduces the intensity of light to zero.

Choices

Choice (4) Response

a.

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

b.

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

c.

Both Ꭺ and Ꭱ are false

d.

Ꭺ is true but Ꭱ is false