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महाराष्ट्र राज्य शिक्षण मंडळएचएससी विज्ञान (सामान्य) इयत्ता १२ वी

According to Bohr's second postulate, the angular momentum of the electron is the integral multiple of h2π. The S.I unit of Plank constant h is the same as ______ - Physics

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प्रश्न

According to Bohr's second postulate, the angular momentum of the electron is the integral multiple of `h/(2pi)`. The S.I unit of Plank constant h is the same as ______ 

पर्याय

  • Linear momentum

  • angular momentum

  • Energy

  • Centripetal force

MCQ
रिकाम्या जागा भरा
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उत्तर

According to Bohr's second postulate, the angular momentum of the electron is the integral multiple of `h/(2pi)`. The S.I unit of Plank constant h is the same as angular momentum.

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पाठ 15: Structure of Atoms and Nuclei - MCQ’S

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संबंधित प्रश्‍न

Linear momentum of an electron in Bohr orbit of H-atom (principal quantum number n) is proportional to ______.


Derive the expression for the energy of an electron in the atom.


State Bohr's second postulate for the atomic model. Express it in its mathematical form.  


Using the expression for the radius of orbit for the Hydrogen atom, show that the linear speed varies inversely to the principal quantum number n the angular speed varies inversely to the cube of principal quantum number n. 


How the linear velocity 'v' of an electron in the Bohr orbit is related to its quantum number 'n'?


Which of the following series of transitions in the spectrum of hydrogen atom falls in ultraviolet region?


The wavelength of the first line in Balmer series in the hydrogen spectrum is 'λ'. What is the wavelength of the second line in the same series?


If the ionisation potential of helium atom is 24.6 volt, the energy required to ionise it will be ____________.


Taking the Bohr radius as a0= 53 pm, the radius of Li++ ion in its ground state, on the basis of Bohr's model, will be about ______.


For which one of the following, Bohr model is not valid?


In Bohr's model of hydrogen atom, the period of revolution of the electron in any orbit is proportional to ______.


In hydrogen atom, the de Broglie wavelength of an electron in the first Bohr's orbit is ____________.

[Given that Bohr radius, a0 = 52.9 pm]


In hydrogen emission spectrum, for any series, the principal quantum number is n. Corresponding maximum wavelength λ is ______.
(R = Rydberg's constant)


The time of revolution of an electron around a nucleus of charge Ze in nth Bohr orbit is directly proportional to ____________.


When an electron in hydrogen atom is excited from its 3rd to 5th stationary orbit, tbe change in angular momentum of electron is (Planck's constant: h = 6.62 x 10-34 Js) ____________.


In hydrogen spectnun, the wavelengths of light emited in a series of spectral lines is given by the equation `1/lambda = "R"(1/3^2 - 1/"n"^2)`, where n = 4, 5, 6 .... And 'R' is Rydberg's constant.
Identify the series and wavelenth region.


If n is principal quantum number and r is the radius of the orbit in which electron revolves around nucleus, then its kinetic energy is ____________.


Electron in Hydrogen atom first jumps from third excited state to second excited state and then from second excited state to first excited state. The ratio of the wavelengths λ1 : λ2 emitted in the two cases respectively is ______.


The momentum of an electron revolving in nth orbit is given by ______.


The value of Rydberg constant in joule is ______.


The orbital frequency of an electron in the hydrogen atom ______.


In Bohr’s atomic model, speed and time period of revolution of an electron in n = 3 level are respectively.


Show that the angular speed of an electron in the nth Bohr orbit is w = `(πme^4)/(2ε_0^2h^3n^3)` and the corresponding frequency of the revolution of the electron is f = `(me^4)/(4ε_0^2h^3n^3)`.


Find the ratio of radius of 1st Bohr orbit to that of 4th Bohr orbit.


The radius of the first Bohr orbit in the hydrogen atom is 0.5315 Å. The radius of the second Bohr orbit in the hydrogen atom is ______.


Explain Balmer series of spectral lines for the hydrogen atom.

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