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

The inkjet printer eject a thin stream of:

Question # 2

We can excite an atom by

Question # 3

CT scanning is the abbreviated name of

Question # 4

Braking radiation causes:

Question # 5

Selenium is:

Question # 6

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

Question # 7

Photons must have energy equal to

Question # 8

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

Question # 9

Laser is a beam of:

Question # 10

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

Question # 11

The electric field lines start from:

Question # 12

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

Question # 13

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

Question # 14

Coulomb multiplied by volt by volt gives the unit called:

Question # 15

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

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 Balmer series lies in that region of electromagnetic wave spectrum which is called:
A. Visible region
B. Invisible region
C. Infra-red region
D. ultraviolet region
2 Spectrum represents the number of component colours present in certain light in terms of:
A. Wavelength
B. Frequency
C. Energy
D. Both (A) and (B)
3 The minimum wavelength of X-rays produced of 1KV potential difference is applied across the anode and cathode of the tube is
A. 1.24 x 10-10m
B. 7.92 x 10-20m
C. 2.78 x 10-14m
D. 3.88 x 10-11m
4 Ultraviolet region lies in ______ series
A. Layman
B. Balmer
C. P fund
D. B racket
5 Balmer series was identified in:
A. 1685
B. 1785
C. 1885
D. 1985
6 Graph of Black body radiation is example of
A. Band spectra
B. Continuo's spectra
C. Line spectra
D. All
7 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
8 Photons must have energy equal to
A. ev
B. En
C. hf
D. None of these
9 An compared to solid matter, a crack or an air bubble allows:
A. Great amount of X-rays to pass
B. Smallast amount of X-rays to pass
C. Very samall amount of X-rays to pass
D. Any of these
10 The results of spectra obtained by Balmer were expressed in 1896 by:
A.
Bohr
B. Rydberg
C. Planck
D. Rutherford

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