NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1422 - 1426 of 2184

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Passage

Read the passage given below and answer the questions that follow:

In a Young’s double slit experiment a monochromatic light whose wavelength is λ strikes on the slits, separated by distance d, as shown in the figure. Refractive index of the medium between slits and screen varies with time t as . Here n 0 and k are positive constants. Position of any point P on screen is measure by its -coordinate as shown.

Young’s double slit experiment

Young’S Double Slit Experiment

In a Young’s double slit experiment a monochromatic light whose wavelength is λ strikes on the slits, separated by distance d, as shown in the figure. Refractive index of the medium between slits and screen varies with time t as n = n0 + kt.

Question number: 1422 (2 of 3 Based on Passage) Show Passage

» Wave Optics » Young's Double Slit Experiment

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MCQ▾

Question

The y co-ordinate of central maxima at any time t is,

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 1423 (3 of 3 Based on Passage) Show Passage

» Wave Optics » Young's Double Slit Experiment

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MCQ▾

Question

The velocity of central maxima at any time t as a function of time t is

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 1424

» Atoms and Nuclei » Hydrogen Spectrum

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MCQ▾

Question

When a hydrogen atom is raised from the ground state to an excited state

Choices

Choice (4) Response

a.

P. E. decreases and K. E. increases

b.

K. E. and P. E. decrease

c.

kinetic energy and potential energy increase

d.

P. E. increases and K. E. decreases

Question number: 1425

» Properties of Solids & Liquids » Latent Heat

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MCQ▾

Question

A bullet moving with a uniform velocity v, stops sudden after hitting the target and the whole mass melts be m, specific heat S, initial temperature 25°C, melting point 475 °C and the latent heat L. Then v is given by

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 1426

» Wave Optics » Polarization

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Assertion-Reason▾

Question

Assertion (Ꭺ)

The unpolarised light and polarised light can be distinguished from each other by using polaroid.

Reason (Ꭱ)

A polaroid is capable of producing plane polarised beams of light.

Choices

Choice (4) Response

a.

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

b.

Ꭺ is false but Ꭱ is true

c.

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

d.

Ꭺ is true but Ꭱ is false