Physics Crash Course NDA & NA EE>Chapter 22 - Atomic Physics>Exercise 1>Q 5

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A beam of electrons striking a copper target produces X-rays. Its spectrum is as shown. Keeping the voltage same if the copper target is replaced with a different metal, the cut-off wavelength and characteristic lines of the new spectrum will change in comparison with old as

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Important Questions on Atomic Physics

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Physics Crash Course NDA & NA EE>Chapter 22 - Atomic Physics>Exercise 1>Q 6

An X-ray tube produces a continuous spectrum of radiation with its shortest wavelength of

45 \times 10^{- 2} Å

. The maximum energy of a photon in the radiation in

eV

is

(h = 6.62 \times 10^{- 34} J s, c = 3 \times 10^{8} {m s}^{- 1})

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Physics Crash Course NDA & NA EE>Chapter 22 - Atomic Physics>Exercise 1>Q 7

On operating an

X

-ray tube at

1 kV

,

X

-rays of minimum wavelength

6.22 Å

are produced. If the tube is operated at

10 kV,

then the minimum wavelength of

X

-rays produced will be

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Physics Crash Course NDA & NA EE>Chapter 22 - Atomic Physics>Exercise 1>Q 8

In an

X

-ray tube, electrons striking a target are brought to rest, causing

X

-rays to be emitted. In a particular

X

-ray tube, the maximum frequency of the emitted continuum

X

-ray spectrum is

f_{0} .

If the voltage across the tube is doubled, the maximum frequency is

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Physics Crash Course NDA & NA EE>Chapter 22 - Atomic Physics>Exercise 1>Q 9

The production of characteristic X-rays is due to-

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Physics Crash Course NDA & NA EE>Chapter 22 - Atomic Physics>Exercise 1>Q 10

Characteristic

X -

Rays are not obtained in the spectrum of

H -

atom because:-