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

A metastable stae:

Question # 2

Consider a photon of continuous X-ray and a photon of characteristics X-ray of same wavelength. Which of the following is/are different for the two photons

Question # 3

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

Question # 4

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

Question # 5

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

Question # 6

Laser is a beam of:

Question # 7

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

Question # 8

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

Question # 9

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

Question # 10

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

Question # 11

Balmer series was identified in:

Question # 12

The life time of metastable state is equal to

Question # 13

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

Question # 14

Tick the series which lies in the visible region:

Question # 15

The range of wavelengths of colurs in the visible colours is

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 The inkjet printer eject a thin stream of:
A. Water
B. Oil
C. Ink
D. Any above
2 Braking radiation causes:
A. Continuous spectrum
B. Line Spectrum
C. Band spectrum
D. Discrete specturm
3 If the distance between two charges is doubled,the force between them will become:
A. Double
B. Half
C. One third
D. One fourth
4 The first series which was identified in the spectrum of hydrogen is called:
A. Lyman series
B. Balmer series
C. Paschen series
D. Brackett series
5 The process of formation of spectrum is called:
A. Interference
B. Spectroscopy
C. Dispersion
D. Reflection
6 X-ray are also known as
A. Roentgen rays
B. Maxwell rays
C. Plank range
D. Einstein rays
7 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
8 The results of spectra obtained by Blamer were expressed in 1896 by
A. Bohr
B. Rydberg
C. Planck
D. Rutherford
9 The lasing or active medium in He-Ne laser discharge tube is:
A. Nitrogen
B. Helium
C. Hydrogen
D. Neon
10 The first shell near the neucles is
A. L-shell
B. X-shell
C. N-shell
D. M-shell

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