NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1436 - 1438 of 2320

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Question number: 1436

» Atoms and Nuclei » Bohr Model

Edit
Assertion-Reason▾

Question

Assertion (Ꭺ)

Bohr postulated that the electrons in stationary orbits around the nucleus do not radiate energy.

Reason (Ꭱ)

According to classical physics all moving electrons radiate energy.

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 and Ꭱ is the correct explanation of Ꭺ

d.

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

Question number: 1437

» Wave Optics » Huygens' Principle

Edit
MCQ▾

Question

Two waves originating from source S 1 and S 2 having zero phase difference and common wavelength X will show completely destructive interference at a point P if (S 1 P - S 2 P) is-

Choices

Choice (4)Response

a.

b.

2 λ

c.

d.

Question number: 1438

» Properties of Solids & Liquids » Specific Heat Capacity

Edit
MCQ▾

Question

Heat is supplied to a certain homogenous sample of matter, at a uniform rate. Its temperature is plotted against time, as shown. Which of the following conclusions can be drawn?

Temperature vs time graph - homogenous sample of matter

Temperature vs Time Graph - Homogenous Sample of Matter

(1) Its specific heat capacity is greater in the liquid state than in the solid state

(2) Its latent heat of vaporization is greater than its latent heat of fusion

(3) Its specific heat capacity is greater in the solid state than in the liquid state

(4) Its latent heat of vaporization is smaller than its latent heat or fusion

Select the correct answers and mark it according to the following codes:

Choices

Choice (4)Response

a.

1 and 3 are correct

b.

1 and 2 are correct

c.

1,2 and 3 are correct

d.

2 and 4 are correct

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