AIIMS Physics: Questions 448 - 452 of 500

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Question number: 448

» Dual Nature of Matter and Radiation » Photoelectric Effect

Appeared in Year: 2007

MCQ▾

Question

Monochromatic light of frequency 6.0×1014Hz is produced by a laser. The power emitted is 2×103W . The number of photons emitted, on the average, by the source per second is: [AIPMT]

Choices

Choice (4) Response
a.

5×1017

b.

5×1016

c.

5×1014

d.

5×1015

Question number: 449

» Dual Nature of Matter and Radiation » Photoelectric Effect

MCQ▾

Question

What will be the wavelength of incident photon, if the threshold wavelength of a metal is 500nm and photo electrons have kinetic energy maximum 1.2eV

Choices

Choice (4) Response
a.

368nm

b.

337nm

c.

537nm

d.

423nm

Question number: 450

» 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: 451

» 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: 452

» 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

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