NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1160 - 1163 of 2142

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Question number: 1160

» Properties of Solids & Liquids » Elastic Behavior

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.

10 × 10 8

b.

20 × 10 8

c.

15 × 10 8

d.

25 × 10 10

Question number: 1161

» Properties of Solids & Liquids » Thermal Expansion

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.

2.316 × 10 -5 / o C

c.

3.316 × 10 -5 /°C

d.

Question does not provide sufficient data or is vague

Question number: 1162

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

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: 1163

» Wave Optics » Polarization

Assertion-Reason▾

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.

Ꭺ is false but Ꭱ is true

b.

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

c.

Both Ꭺ and Ꭱ are false

d.

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

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