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

00:00
Question # 1

We can excite an atom by

Question # 2

Balmer series was identified in:

Question # 3

The value of the metastable state for Neon is

Question # 4

Photons must have energy equal to

Question # 5

The range of wavelengths of colurs in the visible colours is

Question # 6

Gaussian surface is always:

Question # 7

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

Question # 8

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

Question # 9

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

Question # 10

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

Question # 11

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

Question # 12

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

Question # 13

A metastable stae:

Question # 14

The lasing or active medium in He-Ne laser discharge tube is:

Question # 15

Lyman series in the spectrum of hydrogen exists in the :

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 CT scanning is the abbreviated name of
A. Computed Technology
B. Computed Technique
C. Computed Technology
D. Computerized Technique
2 Spectrum represents the number of component colours present in certain light in terms of:
A. Wavelength
B. Frequency
C. Energy
D. Both (A) and (B)
3 The photocopying process is called:
A. Geography
B. Sonography
C. Xerography
D. Zerography
4 Braking radiation causes:
A. Continuous spectrum
B. Line Spectrum
C. Band spectrum
D. Discrete specturm
5 Photons must have energy equal to
A. ev
B. En
C. hf
D. None of these
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 holes created in the L and M shells are occupied by transitions of:
A. Electrons from lower states
B. Electrons from higher state
C. Positrons from higher states
D. Electrons from K shell
8 Coulomb multiplied by volt by volt gives the unit called:
A. farad
B. Ohm
C. Second
D. joule
9 Balmer series lies in that region of electromagnetic wave spectrum which is called:
A. Visible region
B. Invisible region
C. Infra-red region
D. ultraviolet region
10 The results of spectra obtained by Balmer were expressed in 1896 by:
A.
Bohr
B. Rydberg
C. Planck
D. Rutherford

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  • Salmankhan

    Salmankhan

    01 Feb 2018

    Some mcqs having wrong answers.

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