The potential difference that must be applied to stop the fastest photoelectrons emitted by a nickel surface, having work function 5.01 eV, when ultraviolet light of 200 nm falls on it, must be:
Options […]
The minimum wavelength of X-rays produced in a Collidge tube operated at potential difference of 40 kV is
Options
(a) 0.31 Å (b) 3.1 Å (c) 31 Å (d) 311 Å
Correct Answer: […]
Source S₁ is producing, 10¹⁵ photons per second of wavelength 5000Å. Another source S₂ is producing 1.02 x 10¹⁵ photons per second of wavelength 5100Å Then, (power of S₂) (power of S₁) is equal to: […]
X-rays when incident on a metal
Options
(a) Exert force, Transfer energy and Transfer pressure on it (b) Transfer energy only to it (c) Transfer pressure only to it (d) Exert a force […]
Monochromatic light of wavelength 667 nm is produced by a helium neon laser. The power emitted is 9 mW. The number of photons arriving per second on the average at a large irradiated by this […]
The number of photo electrons emitted for light of a frequency v (higher than the threshold frequency v₀) is proportional to:
Options
(a) Threshold frequency (v₀) (b) Intensity of light (c) Frequency of […]
The ratio of specific charge of an α-particle to that of a proton is
Options
(a) (1:2) (b) (2:1) (c) (1:1) (d) (1:3)
Correct Answer:
(1:2)
Explanation:
No explanation available. Be the first […]
Which of the following phenomenon exhibited the particle nature of light?
Options
(a) Photoelectric effect (b) Interference (c) Polarization (d) Refraction
Correct Answer:
Photoelectric effect
Explanation:
No explanation available. Be the first to […]
The work function of sodium is 2.3 eV. The threshold wavelength of sodium will be
Options
(a) 5380 Å (b) 2900 Å (c) 2500 Å (d) 2000 Å
Correct Answer:
5380 Å
Explanation:
Work […]
In a photoelectric effect experiment, the slope of the graph between the stopping potential and the incident frequency will be
Options
(a) 10⁻¹⁵ (b) 10⁻³⁴ (c) 1 (d) 0.5
Correct Answer:
10⁻¹⁵
Explanation: […]
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