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 life time of metastable state is equal to

Question # 2

Braking radiation causes:

Question # 3

The shell closer to the nucleus is called:

Question # 4

Static electricity is produced by the transfer of:

Question # 5

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

Question # 6

The minimum wavelength of X-rays produced of 1KV potential difference is applied across the anode and cathode of the tube is

Question # 7

We can excite an atom by

Question # 8

The first shell near the neucles is

Question # 9

A metastable stae:

Question # 10

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

Question # 11

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

Question # 12

By CAT scans, we can detect the density difference of the order of:

Question # 13

The electric field lines start from:

Question # 14

CT scanning is the abbreviated name of

Question # 15

The He-Ne laser discharge tube is filled with:

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 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
2 The process of formation of spectrum is called:
A. Interference
B. Spectroscopy
C. Dispersion
D. Reflection
3 The minimum wavelength of X-rays produced of 1KV potential difference is applied across the anode and cathode of the tube is
A. 1.24 x 10-10m
B. 7.92 x 10-20m
C. 2.78 x 10-14m
D. 3.88 x 10-11m
4 Ultraviolet region lies in ______ series
A. Layman
B. Balmer
C. P fund
D. B racket
5 Balmer series was identified in:
A. 1685
B. 1785
C. 1885
D. 1985
6 In flesh, light element like carbon, hydrogen and oxygen predominate. Three elements allows ______ amount of incident X-ray to pass through them
A. Small
B. Greater
C. Equal
D. Sometimes
7 The He-Ne laser discharge tube is filled with:
A. 85% He
B. 15% He
C. 50% He
D. 60% He
8 Selenium is:
A. An insulator
B. A conductor
C. Both A and B
D. Excellent conductor
9 The value of the metastable state for Neon is
A. 20.66eV
B. 20.61eV
C. 19.23eV
D. 18.70eV
10 Static electricity is produced by the transfer of:
A. Electrons
B. Protons
C. One fluid
D. Two fluid

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