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

Question # 2

We can excite an atom by

Question # 3

The first series which was identified in the spectrum of hydrogen is called:

Question # 4

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

Question # 5

Gaussian surface is always:

Question # 6

The He-Ne laser discharge tube is filled with:

Question # 7

Laser is a beam of:

Question # 8

The first shell near the neucles is

Question # 9

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

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

Tick the series which lies in the visible region:

Question # 12

The electric field lines start from:

Question # 13

The process of formation of spectrum is called:

Question # 14

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

Question # 15

By CAT scans, we can detect the density difference of the order of:

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 X-rays can penetrate in a solid matte through a distance of several:
A. Kilo metres
B. Metres
C. Centimeters
D. A few angstroms
2 X-rays produced in a tube operating at 105V. The speed of X-rays produced is
A. 3 x 108m/s
B. 3.1 x 108m/s
C. 2.8 x 108m/s
D. 1.88 x 108m/s
3 CT scanning is the abbreviated name of
A. Computed Technology
B. Computed Technique
C. Computed Technology
D. Computerized Technique
4 The process of formation of spectrum is called:
A. Interference
B. Spectroscopy
C. Dispersion
D. Reflection
5 The shell closer to the nucleus is called:
A. N shell
B.
L shell
C. K shell
D. M shell
6 Balmer series was identified in:
A. 1685
B. 1785
C. 1885
D. 1985
7 The results of spectra obtained by Balmer were expressed in 1896 by:
A.
Bohr
B. Rydberg
C. Planck
D. Rutherford
8 The results of spectra obtained by Blamer were expressed in 1896 by
A. Bohr
B. Rydberg
C. Planck
D. Rutherford
9 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
10 Energy required by an electron revolving in certain orbit to jump to an excited state is called:
A. Ionization energy
B. Ionization potential
C. Excitation energy
D. Excitation potential

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