Achieve CUET (UG) Physics Practice Book>Chapter 12 - Atoms>Exercise>Q 41

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Find the ratio of energies of photons produced due to transition of an electron of hydrogen atom from its second permitted energy level to the first level to the highest permitted energy level to the first permitted level.

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Important Questions on Atoms

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Achieve CUET (UG) Physics Practice Book>Chapter 12 - Atoms>Exercise>Q 42

Number of neutrons in

C^{12}

and

C^{14}

are

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Achieve CUET (UG) Physics Practice Book>Chapter 12 - Atoms>Exercise>Q 43

The lifetime of an electron in the state

n = 2

in the hydrogen atom is about

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Achieve CUET (UG) Physics Practice Book>Chapter 12 - Atoms>Exercise>Q 44

Three photons coming from excited atomic hydrogen sample are observed, their energies are

12.1 V

,

10.2 V

and

1.9 eV

. These photons must come from

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Achieve CUET (UG) Physics Practice Book>Chapter 12 - Atoms>Exercise>Q 45

The angular momentum of an electron in first orbit of

{Li}^{+ +}

ion is:

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Achieve CUET (UG) Physics Practice Book>Chapter 12 - Atoms>Exercise>Q 46

To which of the following is Bohr's theory applicable?

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Achieve CUET (UG) Physics Practice Book>Chapter 12 - Atoms>Exercise>Q 47

The minimum orbital angular momentum of the electron in Bohr theory of hydrogen atom is:

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Achieve CUET (UG) Physics Practice Book>Chapter 12 - Atoms>Exercise>Q 48

When hydrogen atom goes from ground state to first excited state the angular momentum increases by

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Achieve CUET (UG) Physics Practice Book>Chapter 12 - Atoms>Exercise>Q 49

In a hydrogen atom, the electron revolving in the fourth orbit, has angular momentum equal to: