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Physics Question on Atoms

According to second postulate of Bohr model, the angular momentum (Ln)(L_n) of nthn^{th} possible orbit of hydrogen atom is given by

A

h2 π n\frac{h}{2\,\pi\, n}

B

n h2 π\frac{n \,h}{2\, \pi}

C

2 π nh\frac{2\,\pi\, n}{h}

D

2 πn h\frac{2\,\pi}{n\, h}

Answer

n h2 π\frac{n \,h}{2\, \pi}

Explanation

Solution

Angular momentum. Ln=mvnrnL_n = mv_n r_n =n h2 π=n ?=\frac{n\,h}{2\,\pi} = n \,?