ECAT Pre Engineering Physics Chapter 20 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 20 Atomic Spectra

Try The MCQ's Test For Physics ECAT Pre Engineering Chapter 20 Atomic Spectra

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Physics ECAT Pre Engineering Chapter 20 Atomic Spectra

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Question # 1

Tick the series which lie/s in. the infra-red region.

Question # 2

Consider a photon of continuous X-ray and a photon of characteristics X-ray of same wavelength. Which of the following is/are different for the two photons

Question # 3

Laser is a beam of:

Question # 4

The lasing or active medium in He-Ne laser discharge tube is:

Question # 5

X-ray are also known as

Question # 6

The inkjet printer eject a thin stream of:

Question # 7

A metastable stae:

Question # 8

X-rays produced in a tube operating at 105V. The speed of X-rays produced is

Question # 9

The results of spectra obtained by Balmer were expressed in 1896 by:

Question # 10

The natural arrangement of colours in the spectrum of white light spectrum is

Question # 11

Spectrum represents the number of component colours present in certain light in terms of:

Question # 12

Balmer series lies in that region of electromagnetic wave spectrum which is called:

Question # 13

If the distance between two charges is doubled,the force between them will become:

Question # 14

Braking radiation causes:

Question # 15

Atoms of hydrogen gas can be excited by passing electric current through it when the gas is filled into the discharge tube at a pressure which is

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 The inkjet printer eject a thin stream of:
A. Water
B. Oil
C. Ink
D. Any above
2 The first shell near the neucles is
A. L-shell
B. X-shell
C. N-shell
D. M-shell
3 In helium Neon Laser Neon = 15% and Helium = 85% used. The lasing gas this unit is
A. Helium
B. Neon
C. Both
D. None of these
4 Braking radiation causes:
A. Continuous spectrum
B. Line Spectrum
C. Band spectrum
D. Discrete specturm
5 Photons must have energy equal to
A. ev
B. En
C. hf
D. None of these
6 The shell closer to the nucleus is called:
A. N shell
B.
L shell
C. K shell
D. M shell
7 If the distance between two charges is doubled,the force between them will become:
A. Double
B. Half
C. One third
D. One fourth
8 X-rays produced in a tube operating at 105V. The speed of X-rays produced is
A. 3 x 108m/s
B. 3.1 x 108m/s
C. 2.8 x 108m/s
D. 1.88 x 108m/s
9 The transitions of electrons in the hydrogen atom result in the emission of spectral lies in the:
A. Ultra red region
B. Visible region
C. Ultraviolet region
D. Any of these
10 An compared to solid matter, a crack or an air bubble allows:
A. Great amount of X-rays to pass
B. Smallast amount of X-rays to pass
C. Very samall amount of X-rays to pass
D. Any of these

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