EASY
AP EAPCET
IMPORTANT
Earn 100
The value of Planck's constant in electron volts is _______
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Important Questions on Atomic Structure
MEDIUM
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IMPORTANT
The kinetic energy of photoelectrons emitted when the metal is irradiated with light of frequency is twice the kinetic energy of photoelectrons, when the same metal is irradiated with light of frequency . What is the work function of the metal in ?
MEDIUM
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IMPORTANT
A -Watt bulb emits a monochromatic light of wavelength Calculate the number of photons emitted per second by the bulb.
HARD
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IMPORTANT
If the radius of electron orbit in a hydrogen like species is , the angular momentum of electron in that orbit is
MEDIUM
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IMPORTANT
If the wave number of first spectral line of Lyman series of is , then the wave number of second line of Balmer series of hydrogen atom in is
MEDIUM
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IMPORTANT
The de-Broglie wavelength (in ) of a sand particle of mass blown by a wind of speed is approximately _______
MEDIUM
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IMPORTANT
How many spectral times will be observed for a hydrogen atom, when an electron retums from shell to shell ?
MEDIUM
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IMPORTANT
Identify the correct statements regarding Balmer series: The ware number of each line in the spectrum of atomic hydrogen is given by the equation where is a constant and and are integers.
(i) As ware length decreases, the lines in the series converge
(ii) The integer is equal to
(iii) The ionization energy of hydrogen can be calculated from the wave number of these lines
(iv) The line of longest wavelength corresponds to
MEDIUM
AP EAPCET
IMPORTANT
The number of waves made by a Bohr electron in one complete revolution in its orbit is
