Dual Nature of Matter and Radiation (AIIMS Physics): Questions 17 - 20 of 27

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Question number: 17

» Dual Nature of Matter and Radiation » Photoelectric Effect

Appeared in Year: 2009

MCQ▾

Question

Monochromatic light of wavelength 667nm is produced by a helium neon laser. The power emitted is 9mW . The number of photons arriving per second on the average at a target irradiated by this beam is –

[AIPMT]

Choices

Choice (4) Response

a.

3×1016

b.

9×1017

c.

9×1015

d.

3×1019

Question number: 18

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

Appeared in Year: 1995

MCQ▾

Question

The accelerating voltage of an electron gun is 50, 000volt . De-Broglie wavelength of the electron will be – [RPMT]

Choices

Choice (4) Response

a.

0.095

b.

0.055

c.

0.077

d.

0.55

Question number: 19

» 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: 20

» 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

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