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

Coulomb multiplied by volt by volt gives the unit called:

Question # 3

Lyman series in the spectrum of hydrogen exists in the :

Question # 4

Braking radiation causes:

Question # 5

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

Question # 6

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

Question # 7

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

Question # 8

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

Question # 9

The value of the metastable state for Neon is

Question # 10

The spectrum emitted from hydrogen filled discharge tube is:

Question # 11

The life time of metastable state is equal to

Question # 12

Energy required by an electron revolving in certain orbit to jump to an excited state is called:

Question # 13

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

Question # 14

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

Question # 15

X-ray are also known as

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 Ultraviolet region lies in ______ series
A. Layman
B. Balmer
C. P fund
D. B racket
2 Static electricity is produced by the transfer of:
A. Electrons
B. Protons
C. One fluid
D. Two fluid
3 The He-Ne laser discharge tube is filled with:
A. 85% He
B. 15% He
C. 50% He
D. 60% He
4 Balmer series was identified in:
A. 1685
B. 1785
C. 1885
D. 1985
5 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
6 Atoms of hydrogen gas can be excited by passing electric current through it when the gas is filled into the discharge tube at a pressure which is
A. Less than atmospheric pressure
B. Much less than atmospheric pressure
C. Greater than atmospheric pressure
D. Much greater than atmospheric pressure
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 By CAT scans, we can detect the density difference of the order of:
A. 1%
B. 20%
C. 30%
D. 50%
9 CT scanning is the abbreviated name of
A. Computed Technology
B. Computed Technique
C. Computed Technology
D. Computerized Technique
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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