NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1370 - 1373 of 2320

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Question number: 1370

» Wave Optics » Young's Double Slit Experiment

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Assertion-Reason▾

Question

Assertion (Ꭺ)

In Young’s double slit experiment, the fringes become indistinct if one of the slits is covered with cellophane paper.

Reason (Ꭱ)

The cellophane paper decreases the wavelength of light.

Choices

Choice (4)Response

a.

Ꭺ is false but Ꭱ is true

b.

Ꭺ is true but Ꭱ is false

c.

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

d.

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

Question number: 1371

» Properties of Solids & Liquids » Thermal Expansion

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MCQ▾

Question

The coefficient of apparent expansion of mercury in a glass vessel is 153 × 10 -6 /°C and in a steel vessel is 144 × 10 -6 / 0 C. If a for steel is 18 × 10 -6 / 0 C, then that of glass is

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 1372

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

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MCQ▾

Question

In a surface tension experiment with a capillary tube water rises up to 0.1 m . If the same experiment is repeated on an artificial satellite, which is revolving around the earth, water will rise in the capillary tube up to heights of,

Choices

Choice (4)Response

a.

0.98 m

b.

0.1 m

c.

Full length of the capillary tube

d.

0.2 m

Question number: 1373

» Thermodynamics » Thermal Equilibrium

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MCQ▾

Question

When heat is given to a gas in an isothermal change, the result will be

Choices

Choice (4)Response

a.

External work done

b.

Increase in internal energy

c.

External work done and a⧵so rise in temp.

d.

Rise in temperature

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