Dual Nature of Matter and Radiation [NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics]: Questions 6 - 9 of 49

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Question number: 6

» 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: 7

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

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MCQ▾

Question

In photoelectric effect if intensity of light is doubled then maximum kinetic energy of photoelectrons will become

Choices

Choice (4)Response

a.

No change

b.

Four time

c.

Double

d.

Half

Question number: 8

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

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MCQ▾

Question

Ultraviolet light of wavelength 280 nm is used in an experiment on photo electric effect with lithium (Φ = 2.5 eV) cathode.

(1) The maximum kinetic energy is 1.9 eV

(2) The stopping potential is 1.9 V

(3) The maximum kinetic energy is 4.4 V

(4) The stopping potential is 4.4 eV

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

Choices

Choice (4)Response

a.

1,2 and 3 are correct

b.

1 and 2 are correct

c.

1 and 3 are correct

d.

2 and 4 are correct

Question number: 9

» Dual Nature of Matter and Radiation » Photoelectric Effect

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MCQ▾

Question

Quantum nature of light is explained by which of the following phenomenon?

Choices

Choice (4)Response

a.

Huygens wave theory

b.

Photoelectric effect

c.

Maxwell electromagnetic theory

d.

de- Broglie theory

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