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

00:00
Question # 1

The life time of metastable state is equal to

Question # 2

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

Question # 3

CT scanning is the abbreviated name of

Question # 4

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

Question # 5

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

Question # 6

The first shell near the neucles is

Question # 7

The range of wavelengths of colurs in the visible colours is

Question # 8

Tick the series which lies in the visible region:

Question # 9

In case of braking radiations, when the rate of deceleration is very large, the emitted radiation corresponds to:

Question # 10

Energy required by an electron revolving in certain orbit to jump to an excited state is called:

Question # 11

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

Question # 12

Photons must have energy equal to

Question # 13

Laser is a beam of:

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 The shell closer to the nucleus is called:
A. N shell
B.
L shell
C. K shell
D. M shell
2 If the distance between two charges is doubled,the force between them will become:
A. Double
B. Half
C. One third
D. One fourth
3 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)
4 The natural arrangement of colours in the spectrum of white light spectrum is
A. VIBGYOR
B. ROYBGIV
C. ROYBIGV
D. BIGROYV
5 The formula of Brackett series can be obtained by putting in the general formula, the value of n equal to:
A.
one
B. two
C. three
D. four
6 The process of formation of spectrum is called:
A. Interference
B. Spectroscopy
C. Dispersion
D. Reflection
7 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
8 Coulomb multiplied by volt by volt gives the unit called:
A. farad
B. Ohm
C. Second
D. joule
9 Selenium is:
A. An insulator
B. A conductor
C. Both A and B
D. Excellent conductor
10 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

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