ECAT Pre Engineering Physics Chapter 20 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 20 Atomic Spectra

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

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Physics ECAT Pre Engineering Chapter 20 Atomic Spectra

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Question # 1

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

Question # 2

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

Question # 3

Gaussian surface is always:

Question # 4

A metastable stae:

Question # 5

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

Question # 6

The electric field lines start from:

Question # 7

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

Question # 8

Graph of Black body radiation is example of

Question # 9

We can excite an atom by

Question # 10

CT scanning is the abbreviated name of

Question # 11

The range of wavelengths of colurs in the visible colours is

Question # 12

Selenium is:

Question # 13

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

Question # 14

X-ray are also known as

Question # 15

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

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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 The process of formation of spectrum is called:
A. Interference
B. Spectroscopy
C. Dispersion
D. Reflection
3 The first shell near the neucles is
A. L-shell
B. X-shell
C. N-shell
D. M-shell
4 The transitions of electrons in the hydrogen atom result in the emission of spectral lies in the:
A. Ultra red region
B. Visible region
C. Ultraviolet region
D. Any of these
5 The photocopying process is called:
A. Geography
B. Sonography
C. Xerography
D. Zerography
6 The electric field lines start from:
A. Positive charge
B. Negative charge
C. Either A and B
D. Neutron
7 X-ray are also known as
A. Roentgen rays
B. Maxwell rays
C. Plank range
D. Einstein rays
8 The results of spectra obtained by Balmer were expressed in 1896 by:
A.
Bohr
B. Rydberg
C. Planck
D. Rutherford
9 The inkjet printer eject a thin stream of:
A. Water
B. Oil
C. Ink
D. Any above
10 Gaussian surface is always:
A. Rectangular
B. Spherical
C. Cylinder
D. Box shape

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  • Salmankhan

    Salmankhan

    01 Feb 2018

    Some mcqs having wrong answers.

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