Beta Question Bank for Engineering: Physics>Chapter 33 - Atomic Physics>Exercise-2>Q 20

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An electron collides with a fixed hydrogen atom in its ground state. Hydrogen atom gets excited and the colliding electron loses all its kinetic energy. Consequently, the hydrogen atom may emit a photon corresponding to the largest wavelength of the Balmer series. The kinetic energy of the colliding electron is given by $\frac{24.2}{N} eV$ . Find the value of $N$ .

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Important Questions on Atomic Physics

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Beta Question Bank for Engineering: Physics>Chapter 33 - Atomic Physics>Exercise-2>Q 21

In an atom, two electrons move around the nucleus in circular orbits of radii

R

and

4 R .

The ratio of the time taken by them to complete one revolution is (neg.'ect electric interaction) :-

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Beta Question Bank for Engineering: Physics>Chapter 33 - Atomic Physics>Exercise-2>Q 22

The electron in hydrogen atom in a sample is in

n^{t h}

excited state, then the number of different spectrum lines obtained in its emission spectrum will be

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Beta Question Bank for Engineering: Physics>Chapter 33 - Atomic Physics>Exercise-2>Q 23

The magnitude of angular momentum, orbit radius and frequency of revolution of electron in hydrogen atom corresponding to quantum number

n

are

L, r

and

f

respectively. Then according to Bohr's theory of hydrogen atom

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Beta Question Bank for Engineering: Physics>Chapter 33 - Atomic Physics>Exercise-2>Q 24

Which of the following is/are not true for

x

-rays ?

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Beta Question Bank for Engineering: Physics>Chapter 33 - Atomic Physics>Exercise-2>Q 25

In a Coolidge tube experiment, the minimum wavelength of the continuous

X

-ray spectrum is equal to

66.3 p m,

then

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Beta Question Bank for Engineering: Physics>Chapter 33 - Atomic Physics>Exercise-2>Q 26

The potential difference applied to an

X

-ray tube is increased. As a result, in the emitted radiation

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Beta Question Bank for Engineering: Physics>Chapter 33 - Atomic Physics>Exercise-2>Q 27

In the characteristic $X$ -ray spectra given in the figure of some atom superimposed on continuous $X$ -ray spectra

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Beta Question Bank for Engineering: Physics>Chapter 33 - Atomic Physics>Exercise-3>Q 2

Statement- $1$ : The Bohr model of the hydrogen atom does not explain the fine structure of spectral lines.

and
Statement- $2$ : The Bohr model does not take into account the spin of the electron