ECAT Pre Computer Science Chapter 20 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 20 Atomic Spectra

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ECAT Physics Chapter 20 Atomic Spectra

00:00
Question # 1

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

Question # 2

The spectrum emitted from hydrogen filled discharge tube is:

Question # 3

Lyman series in the spectrum of hydrogen exists in the :

Question # 4

A metastable stae:

Question # 5

We can excite an atom by

Question # 6

Selenium is:

Question # 7

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

Question # 8

Balmer series was identified in:

Question # 9

The photocopying process is called:

Question # 10

Laser is a beam of:

Question # 11

The value of the metastable state for Neon is

Question # 12

The inkjet printer eject a thin stream of:

Question # 13

Gaussian surface is always:

Question # 14

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

Question # 15

Static electricity is produced by the transfer of:

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 Static electricity is produced by the transfer of:
A. Electrons
B. Protons
C. One fluid
D. Two fluid
2 Selenium is:
A. An insulator
B. A conductor
C. Both A and B
D. Excellent conductor
3 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
4 The results of spectra obtained by Blamer were expressed in 1896 by
A. Bohr
B. Rydberg
C. Planck
D. Rutherford
5 Braking radiation causes:
A. Continuous spectrum
B. Line Spectrum
C. Band spectrum
D. Discrete specturm
6 X-rays produced in a tube operating at 105V. The speed of X-rays produced is
A. 3 x 108m/s
B. 3.1 x 108m/s
C. 2.8 x 108m/s
D. 1.88 x 108m/s
7 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
8 If the distance between two charges is doubled,the force between them will become:
A. Double
B. Half
C. One third
D. One fourth
9 X-ray are also known as
A. Roentgen rays
B. Maxwell rays
C. Plank range
D. Einstein rays
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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