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Free tnpsc model questions Online Test - MeritNotes
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No. of Questions :10
Remaining Time :
1. Who propounded the special theory of relativity?
(a)
Max Planck
(b)
Einstein
(c)
Morley
(d)
Michelson
2. At the threshold frequency, the velocity of the electrons is
(a)
maximum
(b)
minimum
(c)
infinite
(d)
zero
3. The photoelectric effect can be explained on the basis of
(a)
corpuscular theory of light
(b)
quantum theory of light
(c)
wave theory of light
(d)
electromagnetic theory of light
4. Maximum kinetic energy of photo electrons varies linearly with _____ of incident radiation.
(a)
wavelength
(b)
velocity
(c)
momentum
(d)
frequency
5. Who discovered photoelectric effect?
(a)
Hallwachs
(b)
Heinrich Hertz
(c)
Elster
(d)
Geitel
6. Who applied quantum theory of radiation to photoelectric effect?
(a)
Albert Einstein
(b)
Maxwell
(c)
Millikan
(d)
Max Planck
7. Photon is a
(a)
particle
(b)
wave
(c)
neither a particle nor a wave
(d)
either a particle or a wave
8. Which of the following theories explains photoelectric effect?
(a)
Quantum theory
(b)
Electromagnetic theory
(c)
Wave theory
(d)
Corpuscular theory
9. Electron beam operates in _____ medium.
(a)
air
(b)
inert gas
(c)
vacuum
(d)
all of the above
10. In electron microscope, the electron beam emitted by the filament is accelerated through a large potential difference in a device called
(a)
accelerator
(b)
electron gun
(c)
vandegraff generator
(d)
cyclotron