NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1174 - 1178 of 2184

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Question number: 1174

» Wave Optics » Interference

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MCQ▾

Question

The equation of two light waves are , . The ratio of maximum to minimum intensities produced by the superposition of these waves will be

Choices

Choice (4) Response

a.

1: 49

b.

49: 1

c.

7: 1

d.

1: 7

Question number: 1175

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

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MCQ▾

Question

An electromagnetic radiation of frequency 3 × 10 15 cycles per second falls on a photo electric surface whose work function is 4.0 eV Find out the maximum velocity of the photo electrons emitted by the surface-

Choices

Choice (4) Response

a.

13.4 × 10 -19 m/s

b.

19.8 × 10 -19 m/s

c.

1.73 × 10 6 m/s

d.

All of the above

Question number: 1176

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

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MCQ▾

Question

A radio station is transmitting waves of wavelength 300 m. If diffracting power of transmitter is 10 kW, then numbers of photons diffracted per second is-

Choices

Choice (4) Response

a.

1.5 × 10 33

b.

1.5 × 10 29

c.

1.5 × 10 31

d.

1.5 × 10 35

Question number: 1177

» Properties of Solids & Liquids » Heat Transfer » Radiation

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MCQ▾

Question

f between wavelength λ and λ + dλ, e λ and a λ be the emissive and absorptive powers of a body and E λ be the emissive power of a perfectly black body, then according to Kirchhoff’s law, which is true

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 1178

» Properties of Solids & Liquids » Elastic Behavior

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MCQ▾

Question

The ratio of radii of two wires of same material is 2: 1. If these wires are stretched by equal forces, then the ratio of stresses produced in them will be

Choices

Choice (4) Response

a.

4: 1

b.

1: 4

c.

1: 2

d.

2: 1