If particles are moving with same velocity, then maximum de-Broglie wavelength will be for
|
(a) Neutron |
(b) Proton |
(c) b-particle |
(d) α - particle |
(c) b-particle
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The ratio of the refractive index of red light to blue light in air is
|
(a) Less than unity |
|
(b) Equal to unity |
|
(c) Greater than unity |
|
(d) Less as well as greater than unity depending upon the experimental arrangement |
Energy of the electron in nth orbit of hydrogen atom is given by 
. The amount of energy needed to transfer electron from first orbit to third orbit is
|
(a) 13.6 eV |
(b) 3.4 eV |
(c) 12.09 eV |
(d) 1.51 eV |
Two concentric coils each of radius equal to 2π cm are placed at right angles to each other. 3 ampere and 4 ampere are the currents flowing in each coil respectively. The magnetic induction in 
at the centre of the coils will be (
|
(a) 5 |
(b) 7 |
(c) 12 |
(d) |
Four lowest energy levels of H-atom are shown in the figure. The number of possible emission lines would be
|
(a) 3 |
(b) 4 |
(c) 5 |
(d) 6 |
