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महाराष्ट्र राज्य शिक्षण मंडळएचएससी विज्ञान (सामान्य) इयत्ता १२ वी

The speed of electron having de Broglie wavelength of 10 -10 m is ______ (me = 9.1 × 10-31 kg, h = 6.63 × 10-34 J-s) - Physics

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प्रश्न

The speed of electron having de Broglie wavelength of 10 -10 m is ______ 
(me = 9.1 × 10-31 kg, h = 6.63 × 10-34 J-s) 

पर्याय

  • 7.28 × 106 m/s 

  • 4 × 106 m/s

  • 8 × 105 m/s 

  • 5.25 × 105 m/s 

MCQ
रिकाम्या जागा भरा
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उत्तर

The speed of electron having de Broglie wavelength of 10 -10 m is 7.28 × 106 m/s.

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

संबंधित प्रश्‍न

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


Answer in brief.

State the postulates of Bohr’s atomic model.


Answer in one sentence:

Name the element that shows the simplest emission spectrum.


For the hydrogen atom, the minimum excitation energy ( of n =2) is ______


Using de Broglie’s hypothesis, obtain the mathematical form of Bohr’s second postulate.


Calculate the shortest wavelength in the Paschen series if the longest wavelength in the Balmar series is 6563 Ao


State the postulates of Bohr’s atomic model. Hence show the energy of electrons varies inversely to the square of the principal quantum number. 


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


Bohr model is applied to a particle of mass 'm' and charge 'q' is moving in a plane under the influence of a transverse magnetic field 'B. The energy of the charged particle in the nth level will be (h = Planck's constant).


With the increase in principal quantum number, the energy difference between the two successive energy levels ____________.


Which of the following statements about the Bohr model of the hydrogen atom is FALSE?


When the electron in hydrogen atom jumps from fourth Bohr orbit to second Bohr orbit, one gets the ______.


For a certain atom when the system moves from 2E level to E, a photon of wavelength `lambda` is emitted. The wavelength of photon produced during its transition from `(4"E")/3` level to E is ____________.


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?


What is the de Broglie wavelength of an electron of energy 180 eV?

(Mass of electron = 9 x 10-31 kg and Planck's constant = 6.6 x 10-34 Js.)


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


In the nth orbit, the energy of an electron `"E"_"n"= -13.6/"n"^2"eV"` for hydrogen atom. The energy required to take the electron from first orbit to second orbit will be ____________.


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


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 a charge on the body is 1 nC, then how many electrons are present on the body?


In hydrogen atom, during the transition of electron from nth outer orbit to first Bohr orbit, a photon of wavelength `lambda` is emitted. The value of 'n' is [R =Rydberg's constant] ____________.


The de-Broglie wavelength of an electron in 4th orbit is ______.

(r = radius of 1st orbit)


When an electron in a hydrogen atom jumps from the third orbit to the second orbit, it emits a photon of wavelength 'λ'. When it jumps from the fourth orbit to third orbit, the wavelength emitted by the photon will be ______.


An electron of mass m and charge e initially at rest gets accelerated by a constant electric field E. The rate of change of de-Broglie wavelength of this electron at time t ignoring relativistic effects is ______.


The value of Rydberg constant in joule is ______.


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


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