Dual Nature of Matter and Radiation (AIIMS Physics): Questions 21 - 25 of 27

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Question number: 21

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

MCQ▾

Question

An α particle moves in circular path of radius 0.75cm in the presence of a magnetic field of 0.30Wbm2 . Find the De – Broglie wavelength associated with the particle.

Choices

Choice (4) Response

a.

0.02

b.

0.1

c.

0.01

d.

0.03

Question number: 22

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

MCQ▾

Question

A proton and an α particle accelerated through same voltage of 40, 000volt . The ratio of their De-Broglie wavelength will be:

Choices

Choice (4) Response

a.

2:1

b.

2:1

c.

1:2

d.

22:1

Question number: 23

» Dual Nature of Matter and Radiation » Particle Nature of Light

Appeared in Year: 1998

MCQ▾

Question

Work function of a metal surface is ϕ=1.5eV . If a light of wavelength 5000 falls on it then the maximum K. E of ejected electron will be –

[AIPMT]

Choices

Choice (4) Response

a.

0eV

b.

1.2eV

c.

0.98eV

d.

0.45eV

Question number: 24

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

MCQ▾

Question

The De – Broglie wavelength of neutron of energy 5eV is –

Choices

Choice (4) Response

a.

0.236

b.

0.128

c.

0.101

d.

0.256

Question number: 25

» Dual Nature of Matter and Radiation » Particle Nature of Light

MCQ▾

Question

If the work function of a metal is 2.1eV and the wavelength of incident photon is 5.2×107m , than what is the maximum kinetic energy of photo electrons?

Choices

Choice (4) Response

a.

4.5eV

b.

0.3eV

c.

1.3eV

d.

2.4eV

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