ECAT Pre Computer Science Chapter 20 MCQ Test With Answer

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

Gaussian surface is always:

Question # 2

X-rays produced in a tube operating at 105V. The speed of X-rays produced is

Question # 3

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

Question # 4

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

Question # 5

A metastable stae:

Question # 6

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

Question # 7

X-ray are also known as

Question # 8

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

Question # 9

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

Question # 10

CT scanning is the abbreviated name of

Question # 11

Ultraviolet region lies in ______ series

Question # 12

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

Question # 13

The photocopying process is called:

Question # 14

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

Question # 15

Graph of Black body radiation is example of

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 Static electricity is produced by the transfer of:
A. Electrons
B. Protons
C. One fluid
D. Two fluid
2 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
3 The results of spectra obtained by Blamer were expressed in 1896 by
A. Bohr
B. Rydberg
C. Planck
D. Rutherford
4 The shell closer to the nucleus is called:
A. N shell
B.
L shell
C. K shell
D. M shell
5 The natural arrangement of colours in the spectrum of white light spectrum is
A. VIBGYOR
B. ROYBGIV
C. ROYBIGV
D. BIGROYV
6 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
7 Spectrum represents the number of component colours present in certain light in terms of:
A. Wavelength
B. Frequency
C. Energy
D. Both (A) and (B)
8 X-ray are also known as
A. Roentgen rays
B. Maxwell rays
C. Plank range
D. Einstein rays
9 An compared to solid matter, a crack or an air bubble allows:
A. Great amount of X-rays to pass
B. Smallast amount of X-rays to pass
C. Very samall amount of X-rays to pass
D. Any of these
10 The first shell near the neucles is
A. L-shell
B. X-shell
C. N-shell
D. M-shell

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