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

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

Question # 2

Static electricity is produced by the transfer of:

Question # 3

The photocopying process is called:

Question # 4

Gaussian surface is always:

Question # 5

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

Question # 6

The lasing or active medium in He-Ne laser discharge tube is:

Question # 7

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

Question # 8

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

Question # 9

Coulomb multiplied by volt by volt gives the unit called:

Question # 10

The shell closer to the nucleus is called:

Question # 11

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

Question # 12

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

Question # 13

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

Question # 14

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

Question # 15

Photons must have energy equal to

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 The shell closer to the nucleus is called:
A. N shell
B.
L shell
C. K shell
D. M shell
2 Photons must have energy equal to
A. ev
B. En
C. hf
D. None of these
3 The photocopying process is called:
A. Geography
B. Sonography
C. Xerography
D. Zerography
4 The results of spectra obtained by Blamer were expressed in 1896 by
A. Bohr
B. Rydberg
C. Planck
D. Rutherford
5 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
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 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 first shell near the neucles is
A. L-shell
B. X-shell
C. N-shell
D. M-shell
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 The natural arrangement of colours in the spectrum of white light spectrum is
A. VIBGYOR
B. ROYBGIV
C. ROYBIGV
D. BIGROYV

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