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 process of formation of spectrum is called:

Question # 2

Selenium is:

Question # 3

We can excite an atom by

Question # 4

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

Question # 5

The He-Ne laser discharge tube is filled with:

Question # 6

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

Question # 7

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

Question # 8

The value of the metastable state for Neon is

Question # 9

Photons must have energy equal to

Question # 10

Tick the series which lies in the visible region:

Question # 11

Ultraviolet region lies in ______ series

Question # 12

The first shell near the neucles is

Question # 13

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

Question # 14

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

Question # 15

The shell closer to the nucleus is called:

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 The results of spectra obtained by Blamer were expressed in 1896 by
A. Bohr
B. Rydberg
C. Planck
D. Rutherford
2 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
3 By CAT scans, we can detect the density difference of the order of:
A. 1%
B. 20%
C. 30%
D. 50%
4 Lyman series in the spectrum of hydrogen exists in the :
A. Infra-red region
B. Visible region
C. Ultraviolet region
D. Both(A) and (B)
5 CT scanning is the abbreviated name of
A. Computed Technology
B. Computed Technique
C. Computed Technology
D. Computerized Technique
6 The electric field lines start from:
A. Positive charge
B. Negative charge
C. Either A and B
D. Neutron
7 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
8 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
9 The inkjet printer eject a thin stream of:
A. Water
B. Oil
C. Ink
D. Any above
10 The shell closer to the nucleus is called:
A. N shell
B.
L shell
C. K shell
D. M shell

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