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 value of the metastable state for Neon is

Question # 2

The photocopying process is called:

Question # 3

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

Question # 4

The process of formation of spectrum is called:

Question # 5

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 # 6

CT scanning is the abbreviated name of

Question # 7

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

Question # 8

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

Question # 9

Photons must have energy equal to

Question # 10

Selenium is:

Question # 11

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

Question # 12

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

Question # 13

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 # 14

Lyman series in the spectrum of hydrogen exists in the :

Question # 15

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

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 The He-Ne laser discharge tube is filled with:
A. 85% He
B. 15% He
C. 50% He
D. 60% He
2 Coulomb multiplied by volt by volt gives the unit called:
A. farad
B. Ohm
C. Second
D. joule
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 The process of formation of spectrum is called:
A. Interference
B. Spectroscopy
C. Dispersion
D. Reflection
6 The photocopying process is called:
A. Geography
B. Sonography
C. Xerography
D. Zerography
7 The electric field lines start from:
A. Positive charge
B. Negative charge
C. Either A and B
D. Neutron
8 Static electricity is produced by the transfer of:
A. Electrons
B. Protons
C. One fluid
D. Two fluid
9 The spectrum emitted from hydrogen filled discharge tube is:
A. Line spectrum
B. Discrete spectrum
C. And spectrum
D. Absorption spectrum
10 Laser is a beam of:
A. Visible light
B. Infra red light
C. Ultra violet light
D. Violet light only

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