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

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

Question # 2

The value of the metastable state for Neon is

Question # 3

Static electricity is produced by the transfer of:

Question # 4

Balmer series was identified in:

Question # 5

The He-Ne laser discharge tube is filled with:

Question # 6

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

Question # 7

Tick the series which lie/s in. the infra-red region.

Question # 8

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

Question # 9

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

Question # 10

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

Question # 11

Photons must have energy equal to

Question # 12

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

Question # 13

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

Question # 14

An electron of the hydrogen atom in the second orbit is called its:

Question # 15

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

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 A metastable stae:
A. Is an excited state
B. Is that in which excited electron is stable
C. Is that in which excited electron is usually unstable
D. Means a time interval of 10-8second
2 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
3 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
4 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
A. Frequency
B. Penetrating power
C. Energy
D. Method of creation
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 The photocopying process is called:
A. Geography
B. Sonography
C. Xerography
D. Zerography
7 The natural arrangement of colours in the spectrum of white light spectrum is
A. VIBGYOR
B. ROYBGIV
C. ROYBIGV
D. BIGROYV
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 inkjet printer eject a thin stream of:
A. Water
B. Oil
C. Ink
D. Any above
10 The results of spectra obtained by Blamer were expressed in 1896 by
A. Bohr
B. Rydberg
C. Planck
D. Rutherford

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