SUNIL BATRA (41 YEARS IITJEE PHYSICS)|Exercise Comprehension Based Questions|2 Videos
MOVING CHARGES AND MAGNETISM
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A Hydrogen atom and Li^(++) ion are both in the second excited state. If L_(H) and L_(Li) are their respective angular momenta, and E_(H) and E_(Li) their respective energies, then:
A hydrogen atom and a Li^(2+) ion are both in the second excited state. If l_H and l_(Li) are their respective electronic angular momenta, and E_H and E_(Li) their respective energies, then (a) l_H gt l_(Li) and |E_H| gt |E_(Li)| (b) l_H = l_(Li) and |E_H| lt |E_(Li)| (C ) l_H = l_(Li) and |E_H| gt |E_(Li)| (d) l_H lt l_(Li) and |E_H| lt|E_(Li)|
A hydrogen atom and a Li^(2+) ion ae both in the second excited state . If l_H and l_(li) are their respective angular momentum in an orbit and E_H and E_(Li) are their respective enrgies, then :
In a container a mixture is prepared by mixing of three samples of hydrogen helium ion (He^(+)) and lithium ion (Li^(2+)). In sample , all the hydrogen atoms are in 1st excited state and all the He^(+) ions are in third excited state and all the Li^(2+)) ions are in fifth excited state. Find the total number of spectral lines observed in the emission spectrum of such a sample when the electrons return back to the ground state.
A moving H-atom makes a head on perfectly inelastic collision with a stationary Li^(++) ion. Just before collision, both - H and Li^(++) are in their first excited state. Immediately after collision H was found to be in ground state and Li^(++) was in its second excited state. Find the kinetic energy of H – atom before collision. No photon is emitted in the process. Assume that mass of Li^(++) is nearly 7 times the mass of H.
The second ionization energies of Li, Be, B and C are in the order
An electron in the ground state of hydrogen has an angular momentum L_(1) and an electron in the fist excited state of lithium has an angular momentum L_(2) . Then,
Calculate the energy of Li^(+2) atom for 2^(nd) excited state.
The ground state energy of hydrogen atom is -13.6 eV . The energy of second excited state of He^(+) ion in eV is
SUNIL BATRA (41 YEARS IITJEE PHYSICS)-MODERN PHYSICS-MCQ (One Correct Answer