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 photocopying process is called:

Question # 2

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

Question # 3

The electric field lines start from:

Question # 4

Lyman series in the spectrum of hydrogen exists in the :

Question # 5

Gaussian surface is always:

Question # 6

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

Question # 7

The spectrum emitted from hydrogen filled discharge tube is:

Question # 8

The results of spectra obtained by Blamer were expressed in 1896 by

Question # 9

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

Question # 10

CT scanning is the abbreviated name of

Question # 11

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

Question # 12

X-ray are also known as

Question # 13

The life time of metastable state is equal to

Question # 14

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

Question # 15

An electron of the hydrogen atom in the second orbit is called its:

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 By CAT scans, we can detect the density difference of the order of:
A. 1%
B. 20%
C. 30%
D. 50%
2 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
A. Less than atmospheric pressure
B. Much less than atmospheric pressure
C. Greater than atmospheric pressure
D. Much greater than atmospheric pressure
3 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
4 Ultraviolet region lies in ______ series
A. Layman
B. Balmer
C. P fund
D. B racket
5 X-rays can penetrate in a solid matte through a distance of several:
A. Kilo metres
B. Metres
C. Centimeters
D. A few angstroms
6 The He-Ne laser discharge tube is filled with:
A. 85% He
B. 15% He
C. 50% He
D. 60% He
7 Gaussian surface is always:
A. Rectangular
B. Spherical
C. Cylinder
D. Box shape
8 X-ray are also known as
A. Roentgen rays
B. Maxwell rays
C. Plank range
D. Einstein rays
9 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
10 The inkjet printer eject a thin stream of:
A. Water
B. Oil
C. Ink
D. Any above

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