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

The He-Ne laser discharge tube is filled with:

Question # 2

Ultraviolet region lies in ______ series

Question # 3

The holes created in the L and M shells are occupied by transitions of:

Question # 4

Static electricity is produced by the transfer of:

Question # 5

Tick the series which lies in the visible region:

Question # 6

The first shell near the neucles is

Question # 7

Photons must have energy equal to

Question # 8

Balmer series was identified in:

Question # 9

Coulomb multiplied by volt by volt gives the unit called:

Question # 10

The spectrum emitted from hydrogen filled discharge tube is:

Question # 11

CT scanning is the abbreviated name of

Question # 12

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

Question # 13

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

Question # 14

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

Question # 15

The electric field lines start from:

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 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
2 Lyman series in the spectrum of hydrogen exists in the :
A. Infra-red region
B. Visible region
C. Ultraviolet region
D. Both(A) and (B)
3 The lasing or active medium in He-Ne laser discharge tube is:
A. Nitrogen
B. Helium
C. Hydrogen
D. Neon
4 Selenium is:
A. An insulator
B. A conductor
C. Both A and B
D. Excellent conductor
5 Balmer series lies in that region of electromagnetic wave spectrum which is called:
A. Visible region
B. Invisible region
C. Infra-red region
D. ultraviolet region
6 X-rays can penetrate in a solid matte through a distance of several:
A. Kilo metres
B. Metres
C. Centimeters
D. A few angstroms
7 Gaussian surface is always:
A. Rectangular
B. Spherical
C. Cylinder
D. Box shape
8 By CAT scans, we can detect the density difference of the order of:
A. 1%
B. 20%
C. 30%
D. 50%
9 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
10 The shell closer to the nucleus is called:
A. N shell
B.
L shell
C. K shell
D. M shell

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