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

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

Question # 2

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

Question # 3

Gaussian surface is always:

Question # 4

Laser is a beam of:

Question # 5

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

Question # 6

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

Question # 7

Tick the series which lies in the visible region:

Question # 8

Balmer series was identified in:

Question # 9

The electric field lines start from:

Question # 10

Coulomb multiplied by volt by volt gives the unit called:

Question # 11

Static electricity is produced by the transfer of:

Question # 12

Lyman series in the spectrum of hydrogen exists in the :

Question # 13

Ultraviolet region lies in ______ series

Question # 14

The spectrum emitted from hydrogen filled discharge tube is:

Question # 15

In case of braking radiations, when the rate of deceleration is very large, the emitted radiation corresponds to:

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 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
2 The photocopying process is called:
A. Geography
B. Sonography
C. Xerography
D. Zerography
3 Lyman series in the spectrum of hydrogen exists in the :
A. Infra-red region
B. Visible region
C. Ultraviolet region
D. Both(A) and (B)
4 The first shell near the neucles is
A. L-shell
B. X-shell
C. N-shell
D. M-shell
5 The He-Ne laser discharge tube is filled with:
A. 85% He
B. 15% He
C. 50% He
D. 60% He
6 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
7 The shell closer to the nucleus is called:
A. N shell
B.
L shell
C. K shell
D. M shell
8 X-ray are also known as
A. Roentgen rays
B. Maxwell rays
C. Plank range
D. Einstein rays
9 X-rays can penetrate in a solid matte through a distance of several:
A. Kilo metres
B. Metres
C. Centimeters
D. A few angstroms
10 We can excite an atom by
A. Bombardment of particles
B. Radiating photons
C. Providing potential difference
D. All answer are true

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