NEET Physics: Questions 1413 - 1417 of 2098

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Question number: 1413

» Dual Nature of Matter and Radiation » Einstein's Photoelectric Equation

Assertion-Reason▾

Assertion (Ꭺ)

The de-Broglie wavelength of a molecule varies inversely as the square root of temperature.

Reason (Ꭱ)

The root mean square velocity of the molecule is proportional to square root of absolute temperature.

Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are false

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: 1414

» Dual Nature of Matter and Radiation » De-Broglie Relation

MCQ▾

Question

Slope of V0ν curve is-

(Where, V 0 = Stopping potential and ν = frequency)

Choices

Choice (4) Response

a.

he

b.

h

c.

e

d.

ϕ0

Question number: 1415

» Atoms and Nuclei » Energy Levels

MCQ▾

Question

The wavelength of radiation emitted is λ 0 when an electron jumps from the third to the second orbit of hydrogen atom. For the electron jump from the fourth to the second orbit of the hydrogen atom, the wavelength of radiation emitted will be,

Choices

Choice (4) Response

a.

1625λ0

b.

2027λ0

c.

2720λ0

d.

2516λ0

Question number: 1416

» Properties of Solids & Liquids » Elastic Behavior

MCQ▾

Question

The ratio of radii of two wires of same material is 4: 1. If these wires are stretched by equal forces, then the ratio of stresses produced in them will be

Choices

Choice (4) Response

a.

1: 4

b.

1: 16

c.

2: 1

d.

4: 1

Question number: 1417

» Wave Optics » Interference

Assertion-Reason▾

Assertion (Ꭺ)

A 5 % change in wavelength of light received from a star, shows that the star is moving with 0.05 c velocity.

Reason (Ꭱ)

The wavelength of emitted light depends upon the velocity of the source.

Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are false

b.

Ꭺ is true but Ꭱ is false

c.

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

d.

Ꭺ is false but Ꭱ is true

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