ECAT Pre Computer Science Chapter 20 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 20 Atomic Spectra

Try The MCQ's Test For ECAT Physics Chapter 20 Atomic Spectra

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ECAT Physics Chapter 20 Atomic Spectra

00:00
Question # 1

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

Question # 2

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

Question # 3

The photocopying process is called:

Question # 4

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

Question # 5

Ultraviolet region lies in ______ series

Question # 6

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

Question # 7

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

Question # 8

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 # 9

Selenium is:

Question # 10

We can excite an atom by

Question # 11

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

Question # 12

The process of formation of spectrum is called:

Question # 13

The electric field lines start from:

Question # 14

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

Question # 15

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

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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 Energy required by an electron revolving in certain orbit to jump to an excited state is called:
A. Ionization energy
B. Ionization potential
C. Excitation energy
D. Excitation potential
3 Tick the series which lies in the visible region:
A. Lyman series
B. Balmer series
C. Paschen series
D. Brackett series
4 The first shell near the neucles is
A. L-shell
B. X-shell
C. N-shell
D. M-shell
5 The spectrum emitted from hydrogen filled discharge tube is:
A. Line spectrum
B. Discrete spectrum
C. And spectrum
D. Absorption spectrum
6 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
7 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
8 Tick the series which lie/s in. the infra-red region.
A. Pfund series
B. Brackett series
C. Paschen series
D. All of these
9 The He-Ne laser discharge tube is filled with:
A. 85% He
B. 15% He
C. 50% He
D. 60% He
10 X-rays can penetrate in a solid matte through a distance of several:
A. Kilo metres
B. Metres
C. Centimeters
D. A few angstroms

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