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

The He-Ne laser discharge tube is filled with:

Question # 2

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 # 3

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

Question # 4

Photons must have energy equal to

Question # 5

Balmer series was identified in:

Question # 6

Selenium is:

Question # 7

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

Question # 8

The inkjet printer eject a thin stream of:

Question # 9

The electric field lines start from:

Question # 10

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

Question # 11

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

Question # 12

Tick the series which lies in the visible region:

Question # 13

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

Question # 14

Lyman series in the spectrum of hydrogen exists in the :

Question # 15

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

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 The first shell near the neucles is
A. L-shell
B. X-shell
C. N-shell
D. M-shell
2 The electric field lines start from:
A. Positive charge
B. Negative charge
C. Either A and B
D. Neutron
3 The He-Ne laser discharge tube is filled with:
A. 85% He
B. 15% He
C. 50% He
D. 60% He
4 The photocopying process is called:
A. Geography
B. Sonography
C. Xerography
D. Zerography
5 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
6 Braking radiation causes:
A. Continuous spectrum
B. Line Spectrum
C. Band spectrum
D. Discrete specturm
7 The lasing or active medium in He-Ne laser discharge tube is:
A. Nitrogen
B. Helium
C. Hydrogen
D. Neon
8 X-ray are also known as
A. Roentgen rays
B. Maxwell rays
C. Plank range
D. Einstein rays
9 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
10 The inkjet printer eject a thin stream of:
A. Water
B. Oil
C. Ink
D. Any above

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