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

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

Question # 2

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

Question # 3

The life time of metastable state is equal to

Question # 4

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 # 5

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

Question # 6

We can excite an atom by

Question # 7

Braking radiation causes:

Question # 8

The inkjet printer eject a thin stream of:

Question # 9

The first shell near the neucles is

Question # 10

The process of formation of spectrum is called:

Question # 11

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

Question # 12

The value of the metastable state for Neon is

Question # 13

Tick the series which lies in the visible region:

Question # 14

The shell closer to the nucleus is called:

Question # 15

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

Question # 16

Balmer series was identified in:

Question # 17

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

Question # 18

Photons must have energy equal to

Question # 19

X-ray are also known as

Question # 20

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

Question # 21

Selenium is:

Question # 22

The range of wavelengths of colurs in the visible colours is

Question # 23

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

Question # 24

Graph of Black body radiation is example of

Question # 25

Laser is a beam of:

Question # 26

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

Question # 27

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

Question # 28

The electric field lines start from:

Question # 29

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

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 Laser is a beam of:
A. Visible light
B. Infra red light
C. Ultra violet light
D. Violet light only
2 Gaussian surface is always:
A. Rectangular
B. Spherical
C. Cylinder
D. Box shape
3 Tick the series which lies in the visible region:
A. Lyman series
B. Balmer series
C. Paschen series
D. Brackett series
4 The value of the metastable state for Neon is
A. 20.66eV
B. 20.61eV
C. 19.23eV
D. 18.70eV
5 Static electricity is produced by the transfer of:
A. Electrons
B. Protons
C. One fluid
D. Two fluid
6 By CAT scans, we can detect the density difference of the order of:
A. 1%
B. 20%
C. 30%
D. 50%
7 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
8 X-ray are also known as
A. Roentgen rays
B. Maxwell rays
C. Plank range
D. Einstein rays
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 In flesh, light element like carbon, hydrogen and oxygen predominate. Three elements allows ______ amount of incident X-ray to pass through them
A. Small
B. Greater
C. Equal
D. Sometimes

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