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

Ultraviolet region lies in ______ series

Question # 2

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

Question # 3

The photocopying process is called:

Question # 4

The spectrum emitted from hydrogen filled discharge tube is:

Question # 5

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

Question # 6

The electric field lines start from:

Question # 7

CT scanning is the abbreviated name of

Question # 8

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

Question # 9

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 # 10

Laser is a beam of:

Question # 11

Static electricity is produced by the transfer of:

Question # 12

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

Question # 13

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

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 The spectrum emitted from hydrogen filled discharge tube is:
A. Line spectrum
B. Discrete spectrum
C. And spectrum
D. Absorption spectrum
2 The results of spectra obtained by Balmer were expressed in 1896 by:
A.
Bohr
B. Rydberg
C. Planck
D. Rutherford
3 Graph of Black body radiation is example of
A. Band spectra
B. Continuo's spectra
C. Line spectra
D. All
4 The lasing or active medium in He-Ne laser discharge tube is:
A. Nitrogen
B. Helium
C. Hydrogen
D. Neon
5 Photons must have energy equal to
A. ev
B. En
C. hf
D. None of these
6 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
7 The inkjet printer eject a thin stream of:
A. Water
B. Oil
C. Ink
D. Any above
8 The He-Ne laser discharge tube is filled with:
A. 85% He
B. 15% He
C. 50% He
D. 60% He
9 The electric field lines start from:
A. Positive charge
B. Negative charge
C. Either A and B
D. Neutron
10 Static electricity is produced by the transfer of:
A. Electrons
B. Protons
C. One fluid
D. Two fluid

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