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MDCAT Physics Chapter 12 Atomic spectra MCQ's Test
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Total Questions20
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Time Allowed20
MDCAT Physics Chapter 12 Atomic spectra MCQ's Test
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Question # 1
The threshold frequency depends on the nature on:
Question # 2
The potential difference applied to an X-rays tube is increased. As a result, in the emitted radiation
Question # 3
The hydrogen atoms are excited to the stationary state designated by the principal quantum number n=4, the number of maximum spectral lines are observe:
Question # 4
In photoelectric effect experiment, stopping potential depend upon
Question # 5
What is the momentum of a photon of light of wavelength 500 nm in kgm/s:
Question # 6
The shortest wavelength of X-rays emitted from an X-rays tube depends on the:
Question # 7
What will be the number of photons emitted per second by 25 W source of monochromatic light of wavelength 600 nm:
Question # 8
An electron in the n=1 orbit hydrogen atom is bound by 13.6 eV. If a hydrogen atom is in the n=3 state, how much energy is required to ionize it:
Question # 9
How many photons per second does a one-watt bulb emit if its efficiency is 10% and the wavelength of light is 500 nm:
Question # 10
Light of frequency 2 times the threshold frequency is incident on the metalsurface. Ifthe frequency is by quartered and intensity is doubled, the photoelectric becomes
Question # 11
Choose incorrect about properties of photon
Question # 12
A proton and an 𝑎 − 𝒑𝒂𝒓𝒕𝒊𝒄𝒍𝒆 are accelerated through same voltage, the ratio of their de- Broglie wavelength will be:
Question # 13
Of electron of 50 keV strike a heavy target. Then radiation emitted by target will be
Question # 14
When ultraviolet rays are incident in metal plate, then photoelectric effect does not occur. It occurs by the incidence of:
Question # 15
Light of frequency 4f0 is incident on the metal of the threshold frequency f0. The maximum kinetic energy of the emitted photoelectrons is
Question # 16
The minimum energy required to remove an electron is called:
Question # 17
de-Broglie wavelength associated with an electron moving at a speed of 1x106 ms-1 is
Question # 18
The momentum of the moving photon is:
Question # 19
Which of the following statement is true about soft X-rays?
Question # 20
Ultraviolet radiation of 6.2 eV falls on an aluminium surface having work function ∅ = 𝟒. 𝟐 𝒆𝑽.The kinetic energy of the fastest electron emitted is:
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Biology Chapter 1 MCQ - PDF
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