ECAT Pre Engineering Physics Chapter 20 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 20 Atomic Spectra

Try The MCQ's Test For Physics ECAT Pre Engineering Chapter 20 Atomic Spectra

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Physics ECAT Pre Engineering Chapter 20 Atomic Spectra

00:00
Question # 1

The inkjet printer eject a thin stream of:

Question # 2

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

Question # 3

Gaussian surface is always:

Question # 4

The process of formation of spectrum is called:

Question # 5

The life time of metastable state is equal to

Question # 6

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

Question # 7

CT scanning is the abbreviated name of

Question # 8

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

Question # 9

Coulomb multiplied by volt by volt gives the unit called:

Question # 10

The spectrum emitted from hydrogen filled discharge tube is:

Question # 11

Balmer series lies in that region of electromagnetic wave spectrum which is called:

Question # 12

A metastable stae:

Question # 13

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

Question # 14

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

Question # 15

Selenium is:

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 We can excite an atom by
A. Bombardment of particles
B. Radiating photons
C. Providing potential difference
D. All answer are true
2 Coulomb multiplied by volt by volt gives the unit called:
A. farad
B. Ohm
C. Second
D. joule
3 The results of spectra obtained by Balmer were expressed in 1896 by:
A.
Bohr
B. Rydberg
C. Planck
D. Rutherford
4 Braking radiation causes:
A. Continuous spectrum
B. Line Spectrum
C. Band spectrum
D. Discrete specturm
5 The inkjet printer eject a thin stream of:
A. Water
B. Oil
C. Ink
D. Any above
6 In helium Neon Laser Neon = 15% and Helium = 85% used. The lasing gas this unit is
A. Helium
B. Neon
C. Both
D. None of these
7 The He-Ne laser discharge tube is filled with:
A. 85% He
B. 15% He
C. 50% He
D. 60% He
8 Tick the series which lies in the visible region:
A. Lyman series
B. Balmer series
C. Paschen series
D. Brackett series
9 The lasing or active medium in He-Ne laser discharge tube is:
A. Nitrogen
B. Helium
C. Hydrogen
D. Neon
10 Static electricity is produced by the transfer of:
A. Electrons
B. Protons
C. One fluid
D. Two fluid

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  • Salmankhan

    Salmankhan

    01 Feb 2018

    Some mcqs having wrong answers.

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