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What assumes in Bohr's Model of atom 

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Important Questions on Bohr Model, X-Ray Spectra, Wave-Particle Duality

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12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 20 - Bohr Model, X-Ray Spectra, Wave-Particle Duality>EXERCISE 20>Q 40
In Bohr's model of hydrogen atom, which of the following pair of quantities are quantised ? 
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12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 20 - Bohr Model, X-Ray Spectra, Wave-Particle Duality>EXERCISE 20>Q 41
In the spectrum of hydrogen atom, the ratio of longest wavelength in Lyman series to the longest wavelength in the Balmer series is 
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12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 20 - Bohr Model, X-Ray Spectra, Wave-Particle Duality>EXERCISE 20>Q 42

As the electron in Bohr orbit of hydrogen atom passes from the state n=2 to n=1, the kinetic energy K and potential energy U changes as

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12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 20 - Bohr Model, X-Ray Spectra, Wave-Particle Duality>EXERCISE 20>Q 43
The total energy of an electron in the first excited state of hydrogen atom is about -3.4 eV. Its kinetic energy in this state is 
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12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 20 - Bohr Model, X-Ray Spectra, Wave-Particle Duality>EXERCISE 20>Q 44

Which of the following atoms has the lowest ionisation potential ?

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12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 20 - Bohr Model, X-Ray Spectra, Wave-Particle Duality>EXERCISE 20>Q 45
The wavelengths involved in the spectrum of deuterium 21D  are slightly different from that of hydrogen
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12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 20 - Bohr Model, X-Ray Spectra, Wave-Particle Duality>EXERCISE 20>Q 46
The ratio of the wavelength for 2→1 transition in Li2+ He+ and H is
 
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12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 20 - Bohr Model, X-Ray Spectra, Wave-Particle Duality>EXERCISE 20>Q 47

Let the potential energy of hydrogen atom in the ground state be regarded as zero. Then the potential energy in the first excited state will be