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

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Question # 1

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

Question # 2

Tick the series which lie/s in. the infra-red region.

Question # 3

The minimum wavelength of X-rays produced of 1KV potential difference is applied across the anode and cathode of the tube is

Question # 4

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

Question # 5

X-rays produced in a tube operating at 105V. The speed of X-rays produced is

Question # 6

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

Question # 7

The value of the metastable state for Neon is

Question # 8

Gaussian surface is always:

Question # 9

The photocopying process is called:

Question # 10

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

Question # 11

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

Question # 12

Selenium is:

Question # 13

Laser is a beam of:

Question # 14

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

Question # 15

A metastable stae:

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 The results of spectra obtained by Balmer were expressed in 1896 by:
A.
Bohr
B. Rydberg
C. Planck
D. Rutherford
2 The first shell near the neucles is
A. L-shell
B. X-shell
C. N-shell
D. M-shell
3 An compared to solid matter, a crack or an air bubble allows:
A. Great amount of X-rays to pass
B. Smallast amount of X-rays to pass
C. Very samall amount of X-rays to pass
D. Any of these
4 Graph of Black body radiation is example of
A. Band spectra
B. Continuo's spectra
C. Line spectra
D. All
5 X-rays can penetrate in a solid matte through a distance of several:
A. Kilo metres
B. Metres
C. Centimeters
D. A few angstroms
6 The process of formation of spectrum is called:
A. Interference
B. Spectroscopy
C. Dispersion
D. Reflection
7 In case of braking radiations, when the rate of deceleration is very large, the emitted radiation corresponds to:
A. Short wavelength
B. Large wavelength
C. Very large wavelenth
D. Low frequency
8 Photons must have energy equal to
A. ev
B. En
C. hf
D. None of these
9 If the distance between two charges is doubled,the force between them will become:
A. Double
B. Half
C. One third
D. One fourth
10 Tick the series which lies in the visible region:
A. Lyman series
B. Balmer series
C. Paschen series
D. Brackett series

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