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

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

Question # 2

We can excite an atom by

Question # 3

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

Question # 4

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

Question # 5

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

Question # 6

A metastable stae:

Question # 7

Laser is a beam of:

Question # 8

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

Question # 9

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

Question # 10

The photocopying process is called:

Question # 11

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

Question # 12

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

Question # 13

Tick the series which lies in the visible region:

Question # 14

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

Question # 15

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

Question # 16

Lyman series in the spectrum of hydrogen exists in the :

Question # 17

The range of wavelengths of colurs in the visible colours is

Question # 18

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 # 19

Graph of Black body radiation is example of

Question # 20

Photons must have energy equal to

Question # 21

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

Question # 22

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

Question # 23

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

Question # 24

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

Question # 25

The He-Ne laser discharge tube is filled with:

Question # 26

The electric field lines start from:

Question # 27

Selenium is:

Question # 28

X-ray are also known as

Question # 29

The process of formation of spectrum is called:

Question # 30

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

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 X-ray are also known as
A. Roentgen rays
B. Maxwell rays
C. Plank range
D. Einstein rays
2 The value of the metastable state for Neon is
A. 20.66eV
B. 20.61eV
C. 19.23eV
D. 18.70eV
3 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
4 The results of spectra obtained by Blamer were expressed in 1896 by
A. Bohr
B. Rydberg
C. Planck
D. Rutherford
5 Gaussian surface is always:
A. Rectangular
B. Spherical
C. Cylinder
D. Box shape
6 Tick the series which lies in the visible region:
A. Lyman series
B. Balmer series
C. Paschen series
D. Brackett series
7 The natural arrangement of colours in the spectrum of white light spectrum is
A. VIBGYOR
B. ROYBGIV
C. ROYBIGV
D. BIGROYV
8 The shell closer to the nucleus is called:
A. N shell
B.
L shell
C. K shell
D. M shell
9 The first series which was identified in the spectrum of hydrogen is called:
A. Lyman series
B. Balmer series
C. Paschen series
D. Brackett series
10 Ultraviolet region lies in ______ series
A. Layman
B. Balmer
C. P fund
D. B racket

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