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 results of spectra obtained by Blamer were expressed in 1896 by

Question # 2

A metastable stae:

Question # 3

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

Question # 4

Lyman series in the spectrum of hydrogen exists in the :

Question # 5

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

Question # 6

An compared to solid matter, a crack or an air bubble allows:

Question # 7

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

Question # 8

The electric field lines start from:

Question # 9

The inkjet printer eject a thin stream of:

Question # 10

The spectrum emitted from hydrogen filled discharge tube is:

Question # 11

Graph of Black body radiation is example of

Question # 12

X-ray are also known as

Question # 13

In case of braking radiations, when the rate of deceleration is very large, the emitted radiation corresponds to:

Question # 14

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

Question # 15

We can excite an atom by

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 The photocopying process is called:
A. Geography
B. Sonography
C. Xerography
D. Zerography
2 The inkjet printer eject a thin stream of:
A. Water
B. Oil
C. Ink
D. Any above
3 Static electricity is produced by the transfer of:
A. Electrons
B. Protons
C. One fluid
D. Two fluid
4 Coulomb multiplied by volt by volt gives the unit called:
A. farad
B. Ohm
C. Second
D. joule
5 The shell closer to the nucleus is called:
A. N shell
B.
L shell
C. K shell
D. M shell
6 Balmer series lies in that region of electromagnetic wave spectrum which is called:
A. Visible region
B. Invisible region
C. Infra-red region
D. ultraviolet region
7 The natural arrangement of colours in the spectrum of white light spectrum is
A. VIBGYOR
B. ROYBGIV
C. ROYBIGV
D. BIGROYV
8 Laser is a beam of:
A. Visible light
B. Infra red light
C. Ultra violet light
D. Violet light only
9 Balmer series was identified in:
A. 1685
B. 1785
C. 1885
D. 1985
10 X-ray are also known as
A. Roentgen rays
B. Maxwell rays
C. Plank range
D. Einstein rays

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