Number of electrons that constitute one ampere of current is :
265x1016
625x1012
4.8 x 1010
625x1016
- The mass of an electron in motion depends upon:
- A proton and an alpha particle having same momentum enter a magnetic field at right angles to it. If r1…
- In the lowest orbit, the binding energy of an electron in hydrogen atom is 13.6 eV. The energy required…
- In Rutherford experiment the number of a-particles scattered through an angle 60° is 112 per minute,…
- An α-particle accelerated through V volt is fired towards a nucleus. Its distance of closest approach…
- Number of electrons that constitute one ampere of current is :
- Minimum excitation potential of Bohr's first orbit in hydrogen atom is:
- It is given for the azimuthal quantum number l = 3, the total number of different possible values of…
- Which of the following is incorrect regarding Rutherford's atomic model ?
- For electron moving in nth orbit of the atom, the angularvelocity is proportional to :
- Atomic hydrogen is excited to the nth energy level. The maximum number of spectral lines which it can…
- In terms of Rydberg Constant R, the wave number of the first Balmer line is :
- α-particles are projected towards the nuclei of the following metals, with the same kinetic energy.…
- The order of size of nucleus and Bohr radius of an atom respectively are:
- The velocity of an electron in its fifth orbit, if the velocity of an electron in the second orbit of…
- If Bohr's radius is R0 then radius of 3rd orbit of hydrigen atom will be:
- The KE of the electron in an orbit of radius r in hydrogen atom is : (e = electronic charge)
- The distance of closest approach of an α-particle fired towards a nucleus with momentum p, is r.…
- If the electron in a hydrogen atom jumps from an orbit level n1 = 3 to an orbit level n2 = 2, the…
- In the lowest energy level of hydrogen atom, electron has the angular momentum:
- The mass and energy equivalent to 1 a.m.u. respectively are :
- The radius of hydrogen atom, when it is in its second excited state, becomes :
- The angular momentum of electron in hydrogen atom is proportional to :
- The acceleration of electron in the first orbit of hydrogen atom is: