ECAT Pre General Science Physics Chapter 20 MCQ Test With Answer

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

Try The 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

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Question # 1

The minimum wavelength of X-rays produced of 1KV potential difference is applied across the anode and cathode of the tube is

Question # 2

In helium Neon Laser Neon = 15% and Helium = 85% used. The lasing gas this unit is

Question # 3

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

Question # 4

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

Question # 5

The transitions of electrons in the hydrogen atom result in the emission of spectral lies in the:

Question # 6

Coulomb multiplied by volt by volt gives the unit called:

Question # 7

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

Question # 8

The value of the metastable state for Neon is

Question # 9

Balmer series was identified in:

Question # 10

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

Question # 11

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

Question # 12

Braking radiation causes:

Question # 13

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 # 14

Lyman series in the spectrum of hydrogen exists in the :

Question # 15

We can excite an atom by

Question # 16

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

Question # 17

The range of wavelengths of colurs in the visible colours is

Question # 18

Gaussian surface is always:

Question # 19

X-rays can penetrate in a solid matte through a distance of several:

Question # 20

The He-Ne laser discharge tube is filled with:

Question # 21

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

Question # 22

The inkjet printer eject a thin stream of:

Question # 23

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

Question # 24

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

Question # 25

Static electricity is produced by the transfer of:

Question # 26

A metastable stae:

Question # 27

The shell closer to the nucleus is called:

Question # 28

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

Question # 29

Laser is a beam of:

Question # 30

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

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 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
A. Frequency
B. Penetrating power
C. Energy
D. Method of creation
2 The results of spectra obtained by Balmer were expressed in 1896 by:
A.
Bohr
B. Rydberg
C. Planck
D. Rutherford
3 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
4 The shell closer to the nucleus is called:
A. N shell
B.
L shell
C. K shell
D. M shell
5 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
6 The photocopying process is called:
A. Geography
B. Sonography
C. Xerography
D. Zerography
7 In case of braking radiations, when the rate of deceleration is very large, the emitted radiation corresponds to:
A. Short wavelength
B. Large wavelength
C. Very large wavelenth
D. Low frequency
8 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)
9 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
10 X-ray are also known as
A. Roentgen rays
B. Maxwell rays
C. Plank range
D. Einstein rays

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