ECAT Pre Computer Science Chapter 20 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 20 Atomic Spectra

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

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ECAT Physics Chapter 20 Atomic Spectra

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Question # 1

X-rays can penetrate in a solid matte through a distance of several:

Question # 2

The range of wavelengths of colurs in the visible colours is

Question # 3

In helium Neon Laser Neon = 15% and Helium = 85% used. The lasing gas this unit is

Question # 4

The life time of metastable state is equal to

Question # 5

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

Question # 6

An compared to solid matter, a crack or an air bubble allows:

Question # 7

The formula of Brackett series can be obtained by putting in the general formula, the value of n equal to:

Question # 8

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

Question # 9

The inkjet printer eject a thin stream of:

Question # 10

Static electricity is produced by the transfer of:

Question # 11

The spectrum emitted from hydrogen filled discharge tube is:

Question # 12

CT scanning is the abbreviated name of

Question # 13

Selenium is:

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 Photons must have energy equal to
A. ev
B. En
C. hf
D. None of these
2 Spectrum represents the number of component colours present in certain light in terms of:
A. Wavelength
B. Frequency
C. Energy
D. Both (A) and (B)
3 Static electricity is produced by the transfer of:
A. Electrons
B. Protons
C. One fluid
D. Two fluid
4 An electron of the hydrogen atom in the second orbit is called its:
A. Ground state
B. Excited state
C. Ionized state
D. Any of these
5 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
6 The inkjet printer eject a thin stream of:
A. Water
B. Oil
C. Ink
D. Any above
7 Ultraviolet region lies in ______ series
A. Layman
B. Balmer
C. P fund
D. B racket
8 The spectrum emitted from hydrogen filled discharge tube is:
A. Line spectrum
B. Discrete spectrum
C. And spectrum
D. Absorption spectrum
9 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
10 Energy required by an electron revolving in certain orbit to jump to an excited state is called:
A. Ionization energy
B. Ionization potential
C. Excitation energy
D. Excitation potential

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