NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1276 - 1279 of 2184

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Question number: 1276

» Thermodynamics » Concept of Temperature

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MCQ▾

Question

If 300 ml of gas at 27°C is cooled to 7°C at constant pressure, then its final volume will be

Choices

Choice (4) Response

a.

135 ml

b.

540 ml

c.

280 ml

d.

350 ml

Question number: 1277

» Wave Optics » Young's Double Slit Experiment

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Assertion-Reason▾

Question

Assertion (Ꭺ)

In Young’s experiment, the fringe width for dark fringes is same as that for white fringes.

Reason (Ꭱ)

In Young’s double slit experiment performed with a source of white light, only black and bright fringes are observed.

Choices

Choice (4) Response

a.

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

b.

Ꭺ is false but Ꭱ is true

c.

Both Ꭺ and Ꭱ are false

d.

Ꭺ is true but Ꭱ is false

Question number: 1278

» Properties of Solids & Liquids » Thermal Expansion

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MCQ▾

Question

A rod of length 20 cm is made of metal. It expands by 0.075 cm when its temperature is raised from 0°C to 100°C. Another rod of a different metal B having the same length expands by 0.045 cm for the same change in temperature. A third rod of the same length is composed of two parts, one of metal A and the other of metal B. This rod expands by 0.060 cm for the same change in temperature. The portion made of metal A has the length

Choices

Choice (4) Response

a.

10 cm

b.

15 cm

c.

18 cm

d.

20 cm

Question number: 1279

» Properties of Solids & Liquids » Modulus of Rigidity

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MCQ▾

Question

The compressibility of water is 5 × 10 -10 m 2 /N. If it is subjected to a pressure of 20 MPa the fractional decrease in volume will be -

Choices

Choice (4) Response

a.

5.0 × 10 -3

b.

1.5 × 10 -2

c.

7.5 ×10 -3

d.

3.3 × 10 -5