Alpha Question Bank for Engineering: Physics>Chapter 33 - Atomic Physics>Exercise - 2>Q 30

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The potential difference applied to an X-ray tube is increased. As a result, in the emitted radiation,

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Important Questions on Atomic Physics

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Alpha Question Bank for Engineering: Physics>Chapter 33 - Atomic Physics>Exercise - 2>Q 31

X-ray falling on a material

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Alpha Question Bank for Engineering: Physics>Chapter 33 - Atomic Physics>Exercise - 2>Q 32

In an x-ray tube the voltage applied is

20 kV

. The energy required to remove an electron from

K

shell is

19.9 KeV

. In the x-rays emitted by the tube

(h c = 12420 eV \overset{\circ}{A})

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

In an

X

-ray tube, the accelerating voltage is

20 kV

. Two targets

A

and

B

are used one by one. For

A

the wavelength of the

K_{α}

line is

62 pm

. For

‘ B ’

the wavelength of the

L_{α}

line is

124 pm

. The energy of the

B

ion with vacancy in

M

shell is

5.5 keV

higher than the atom of

B

. [Take

hc = 12400 eV \overset{\circ}{A}

]

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Alpha Question Bank for Engineering: Physics>Chapter 33 - Atomic Physics>Exercise - 2>Q 34

When

Z

is doubled in a hydrogen like atom, which of the following statements are consistent with Bohr’s theory?

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Alpha Question Bank for Engineering: Physics>Chapter 33 - Atomic Physics>Exercise - 2>Q 35

Let

A_{n}

be the area enclosed by the nth orbit in a hydrogen atom. The graph of

\ln (\frac{A_{n}}{A_{1}})

against

\ln (n)

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Alpha Question Bank for Engineering: Physics>Chapter 33 - Atomic Physics>Exercise - 3>Q 1

The largest wavelength in the ultraviolet region of the hydrogen spectrum is

122 nm

. The smallest wavelength in the infrared region of the hydrogen spectrum (to the nearest integer) is

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

STATEMENT-1 : If the accelerating potential in an X-ray tube is increased, the wavelengths of the characteristic X-rays do not change.

because

STATEMENT-2 : When an electron beam strikes the target in an X-ray tube, part of the kinetic energy is converted into X-ray energy.

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

Which one of the following statements is wrong in the context of

X -

rays generated from a

X -

ray tube?