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In the Bohr's hydrogen atom model, the radius of the stationary orbit varies with principal quantum number as

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Important Questions on Atoms, Molecules and Nuclei

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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 2 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 12 - Atoms, Molecules and Nuclei>Competitive Thinking>Q 6
An electron revolves around the nucleus. The radius of the circular orbit is r . To double the kinetic energy of electron its orbit radius is
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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 2 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 12 - Atoms, Molecules and Nuclei>Competitive Thinking>Q 7
The radius of hydrogen atom, in its ground state, is of the order of
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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 2 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 12 - Atoms, Molecules and Nuclei>Competitive Thinking>Q 8
The fact that photons carry energy was established by
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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 2 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 12 - Atoms, Molecules and Nuclei>Competitive Thinking>Q 9

An electron in first orbit of hydrogen moves in circular orbit of radius r with velocity v. The current through loop is

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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 2 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 12 - Atoms, Molecules and Nuclei>Competitive Thinking>Q 10
The electron in first orbit of hydrogen moves with velocity 2.18×106 m s-1. If radius of first orbit is 0.53 A°, then orbital current is
 
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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 2 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 12 - Atoms, Molecules and Nuclei>Competitive Thinking>Q 11
Ratio of velocity of electron in first orbit of H to speed of light is
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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 2 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 12 - Atoms, Molecules and Nuclei>Competitive Thinking>Q 12
The period of revolution of an electron in the ground state of hydrogen atom is T. The period of revolution of the electron in the first excited state is
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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 2 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 12 - Atoms, Molecules and Nuclei>Competitive Thinking>Q 13
When electron jumps from n=4 level to n=1 level, the angular momentum of electron changes by