ECAT Pre General Science Physics Chapter 20 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 20 Atomic Spectra

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ECAT Pre General Science Physics Chapter 20 Atomic Spectra

00:00
Question # 1

The process of formation of spectrum is called:

Question # 2

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

Question # 3

A metastable stae:

Question # 4

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

Question # 5

Ultraviolet region lies in ______ series

Question # 6

Selenium is:

Question # 7

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

Question # 8

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

Question # 9

The inkjet printer eject a thin stream of:

Question # 10

Balmer series lies in that region of electromagnetic wave spectrum which is called:

Question # 11

Tick the series which lies in the visible region:

Question # 12

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

Question # 13

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

Question # 14

We can excite an atom by

Question # 15

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

Question # 16

The lasing or active medium in He-Ne laser discharge tube is:

Question # 17

CT scanning is the abbreviated name of

Question # 18

Coulomb multiplied by volt by volt gives the unit called:

Question # 19

Photons must have energy equal to

Question # 20

The spectrum emitted from hydrogen filled discharge tube is:

Question # 21

Lyman series in the spectrum of hydrogen exists in the :

Question # 22

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 # 23

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

Question # 24

The value of the metastable state for Neon is

Question # 25

The photocopying process is called:

Question # 26

The He-Ne laser discharge tube is filled with:

Question # 27

Laser is a beam of:

Question # 28

Consider a photon of continuous X-ray and a photon of characteristics X-ray of same wavelength. Which of the following is/are different for the two photons

Question # 29

The shell closer to the nucleus is called:

Question # 30

Gaussian surface is always:

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 The minimum wavelength of X-rays produced of 1KV potential difference is applied across the anode and cathode of the tube is
A. 1.24 x 10-10m
B. 7.92 x 10-20m
C. 2.78 x 10-14m
D. 3.88 x 10-11m
2 An electron of the hydrogen atom in the second orbit is called its:
A. Ground state
B. Excited state
C. Ionized state
D. Any of these
3 The natural arrangement of colours in the spectrum of white light spectrum is
A. VIBGYOR
B. ROYBGIV
C. ROYBIGV
D. BIGROYV
4 By CAT scans, we can detect the density difference of the order of:
A. 1%
B. 20%
C. 30%
D. 50%
5 The shell closer to the nucleus is called:
A. N shell
B.
L shell
C. K shell
D. M shell
6 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)
7 The process of formation of spectrum is called:
A. Interference
B. Spectroscopy
C. Dispersion
D. Reflection
8 If the distance between two charges is doubled,the force between them will become:
A. Double
B. Half
C. One third
D. One fourth
9 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)
10 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

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