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

CT scanning is the abbreviated name of

Question # 2

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

Question # 3

We can excite an atom by

Question # 4

The value of the metastable state for Neon is

Question # 5

The range of wavelengths of colurs in the visible colours is

Question # 6

In flesh, light element like carbon, hydrogen and oxygen predominate. Three elements allows ______ amount of incident X-ray to pass through them

Question # 7

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

Question # 8

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

Question # 9

Balmer series was identified in:

Question # 10

The spectrum emitted from hydrogen filled discharge tube is:

Question # 11

Gaussian surface is always:

Question # 12

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

Question # 13

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

Question # 14

The inkjet printer eject a thin stream of:

Question # 15

The photocopying process is called:

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 The process of formation of spectrum is called:
A. Interference
B. Spectroscopy
C. Dispersion
D. Reflection
2 Coulomb multiplied by volt by volt gives the unit called:
A. farad
B. Ohm
C. Second
D. joule
3 The electric field lines start from:
A. Positive charge
B. Negative charge
C. Either A and B
D. Neutron
4 The life time of metastable state is equal to
A. Life time of excited state
B. Greater than by excited state
C. Zero
D. Less than by excited state
5 The spectrum emitted from hydrogen filled discharge tube is:
A. Line spectrum
B. Discrete spectrum
C. And spectrum
D. Absorption spectrum
6 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
7 Tick the series which lie/s in. the infra-red region.
A. Pfund series
B. Brackett series
C. Paschen series
D. All of these
8 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
9 Static electricity is produced by the transfer of:
A. Electrons
B. Protons
C. One fluid
D. Two fluid
10 The range of wavelengths of colurs in the visible colours is
A. 140 nm to 456 nm
B. 10 nm to 56 nm
C. 410 nm to 656 nm
D. 910 nm to 956 nm

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