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Number of electrons that constitute one ampere of current is :

A. 265x1016

B. 625x1012

C. 4.8 x 1010

D. 625x1016

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  1. If Bohr's radius is R0 then radius of 3rd orbit of hydrigen atom will be:
  2. The order of size of nucleus and Bohr radius of an atom respectively are:
  3. Which of the following is incorrect regarding Rutherford's atomic model ?
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  9. In the lowest energy level of hydrogen atom, electron has the angular momentum:
  10. If the electron in a hydrogen atom jumps from an orbit level n1 = 3 to an orbit level n2 = 2, the…
  11. The radius of hydrogen atom, when it is in its second excited state, becomes :
  12. It is given for the azimuthal quantum number l = 3, the total number of different possible values of…
  13. The acceleration of electron in the first orbit of hydrogen atom is:
  14. The KE of the electron in an orbit of radius r in hydrogen atom is : (e = electronic charge)
  15. Atomic hydrogen is excited to the nth energy level. The maximum number of spectral lines which it can…
  16. In terms of Rydberg Constant R, the wave number of the first Balmer line is :
  17. The mass and energy equivalent to 1 a.m.u. respectively are :
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  19. Minimum excitation potential of Bohr's first orbit in hydrogen atom is:
  20. The angular momentum of electron in hydrogen atom is proportional to :
  21. The velocity of an electron in its fifth orbit, if the velocity of an electron in the second orbit of…
  22. The mass of an electron in motion depends upon:
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