NEET Physics: Questions 1161 - 1164 of 2099

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Question number: 1161

» 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: 1162

» 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: 1163

» 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.

2Tcosθbdg

b.

Tcosθbd

c.

2Tbdcosθ

d.

Tcosθbdg

Question number: 1164

» 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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