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 He-Ne laser discharge tube is filled with:

Question # 2

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

Question # 3

The first shell near the neucles is

Question # 4

The photocopying process is called:

Question # 5

The transitions of electrons in the hydrogen atom result in the emission of spectral lies in the:

Question # 6

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

Question # 7

Balmer series was identified in:

Question # 8

We can excite an atom by

Question # 9

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

Question # 10

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 # 11

The formula of Brackett series can be obtained by putting in the general formula, the value of n equal to:

Question # 12

Graph of Black body radiation is example of

Question # 13

In flesh, light element like carbon, hydrogen and oxygen predominate. Three elements allows ______ amount of incident X-ray to pass through them

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 The results of spectra obtained by Balmer were expressed in 1896 by:
A.
Bohr
B. Rydberg
C. Planck
D. Rutherford
2 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
3 The He-Ne laser discharge tube is filled with:
A. 85% He
B. 15% He
C. 50% He
D. 60% He
4 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
5 Graph of Black body radiation is example of
A. Band spectra
B. Continuo's spectra
C. Line spectra
D. All
6 Static electricity is produced by the transfer of:
A. Electrons
B. Protons
C. One fluid
D. Two fluid
7 The spectrum emitted from hydrogen filled discharge tube is:
A. Line spectrum
B. Discrete spectrum
C. And spectrum
D. Absorption spectrum
8 The electric field lines start from:
A. Positive charge
B. Negative charge
C. Either A and B
D. Neutron
9 We can excite an atom by
A. Bombardment of particles
B. Radiating photons
C. Providing potential difference
D. All answer are true
10 An electron of the hydrogen atom in the second orbit is called its:
A. Ground state
B. Excited state
C. Ionized state
D. Any of these

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