Penetrating power of X-rays does not depend on
Options
(a) potential difference (between anode and cathode) (b) Current in the filament (c) Wavelength ( of X-rays) (d) Energy ( of X-rays)
Correct Answer: […]
Light of wavelength λᴀ and λʙ falls on two identical metal plates A and B respectively. The maximum kinetic energy of photoelectrons is Kᴀ and Kʙ respectively, then which one of the following reletions is […]
When the energy of the incident radiation is increased by 20%, the kinetic energy of the photoelectrons emitted from a metal surface increased from 0.5 eV to 0.8 eV. The work function of the metal […]
what is the de-Broglie wavelength of the electron accelerated through a potential difference of 100V?
Options
(a) 12.27Å (b) 1.227Å (c) 0.1227Å (d) 0.001227Å
Correct Answer:
1.227Å
Explanation:
No explanation available. Be the […]
The most important characteristic of electron in the production of X-rays is
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(a) Revolution of electron around the nucleus (b) Speed of electron(Striking the target) (c) Charge of electron(Striking the target) (d) […]
For photoelectric emission to take place
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(a) Frequency of incident radiations should be less than threshold frequency (b) Wavelength of incident radiation should be less than threshold wavelength (c) Frequency of incident […]
Rate of photoelectric emission is proportional to
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(a) Frequency of incident radiations (b) Intensity of incident radiations (c) Square of intensity radiations (d) Square of frequency of incident radiations
Correct Answer:
Intensity […]
When indensity of radiation is increased on a photosensitive plate, then
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(a) The kinetic energy of photoelectrons increases (b) The number of photoelectrons increases (c) both number and kinetic energy of photoelectrons […]
The electrons are emitted in the photoelectric effect from a metal surface
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(a) Only if the temperature of the surface is high (b) with a maximum velocity proportional to the frequency of […]
The work function of metals is in the range of 2 eV to 5 eV. Find which of the following wavelength of light cannot be used for photoelectric effect? (Consider, planck constant=4×10⁻¹⁵ eVs, velocity of […]
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