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

X-ray are also known as

Question # 2

Coulomb multiplied by volt by volt gives the unit called:

Question # 3

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

Question # 4

We can excite an atom by

Question # 5

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

Question # 6

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

Question # 7

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

Question # 8

The holes created in the L and M shells are occupied by transitions of:

Question # 9

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

Question # 10

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

Question # 11

The range of wavelengths of colurs in the visible colours is

Question # 12

The first shell near the neucles is

Question # 13

Laser is a beam of:

Question # 14

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

Question # 15

The process of formation of spectrum is called:

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 The natural arrangement of colours in the spectrum of white light spectrum is
A. VIBGYOR
B. ROYBGIV
C. ROYBIGV
D. BIGROYV
2 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
3 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
4 Tick the series which lies in the visible region:
A. Lyman series
B. Balmer series
C. Paschen series
D. Brackett series
5 The results of spectra obtained by Balmer were expressed in 1896 by:
A.
Bohr
B. Rydberg
C. Planck
D. Rutherford
6 Gaussian surface is always:
A. Rectangular
B. Spherical
C. Cylinder
D. Box shape
7 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
8 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
9 The results of spectra obtained by Blamer were expressed in 1896 by
A. Bohr
B. Rydberg
C. Planck
D. Rutherford
10 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

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