Atoms Test - 54...

Dynamic mass of the photon in usual notations is given by -

Which of the following postulates of the Bohr model led to the quantization of energy of the hydrogen atom?

a diatomic has a moment of inertia.By Bohr's quantization condition its rotational energy in the $$n^{th}$$ level ( n= 0 is not allowed ) is :

The orbital angular moments of an electron is $$\sqrt 3 \cfrac h {\pi}$$.Which of the following may be the permissible value of angular momentum of this electron revolving in an unknown orbit.

In a hydrogen atom the force acting on the electron is proportional to :

$$2N$$ molecules of an ideal gas '$$X$$' each of mass '$$m$$' and $$4N$$ molecules of another ideal gas $$Y,$$ each of mass $$3m$$ are maintained at the same absolute temperature in the same vessel. The rms velocity are $$V1$$ and $$V2$$ respectively then (along x-coordinate axis)$$\dfrac{v_x}{v_y}$$

Alpha particles are projected towards fixed at a nucleus. Which of the paths shown in figure, is not possible

An electron tube was sealed off during manufacture at a pressure of $$1.2 \times 10^{-7}$$ mm of mercury at $$27^oC$$. Its volume is $$100 cm^3$$. The number of molecules that remain in the tube is

Orbital acceleration of electron in first orbit of hydrogen atom is:

Equivalent electric current created by electron of a H-atom in its ground using Bohr's model is nearly