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

Balmer series was identified in:

Question # 2

A metastable stae:

Question # 3

The first shell near the neucles is

Question # 4

An compared to solid matter, a crack or an air bubble allows:

Question # 5

The transitions of electrons in the hydrogen atom result in the emission of spectral lies in the:

Question # 6

The range of wavelengths of colurs in the visible colours is

Question # 7

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

Question # 8

Tick the series which lies in the visible region:

Question # 9

X-ray are also known as

Question # 10

The first series which was identified in the spectrum of hydrogen is called:

Question # 11

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

Question # 12

Selenium is:

Question # 13

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

Question # 14

The process of formation of spectrum is called:

Question # 15

Braking radiation causes:

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 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
2 The electric field lines start from:
A. Positive charge
B. Negative charge
C. Either A and B
D. Neutron
3 X-rays can penetrate in a solid matte through a distance of several:
A. Kilo metres
B. Metres
C. Centimeters
D. A few angstroms
4 Gaussian surface is always:
A. Rectangular
B. Spherical
C. Cylinder
D. Box shape
5 Consider a photon of continuous X-ray and a photon of characteristics X-ray of same wavelength. Which of the following is/are different for the two photons
A. Frequency
B. Penetrating power
C. Energy
D. Method of creation
6 By CAT scans, we can detect the density difference of the order of:
A. 1%
B. 20%
C. 30%
D. 50%
7 Graph of Black body radiation is example of
A. Band spectra
B. Continuo's spectra
C. Line spectra
D. All
8 The process of formation of spectrum is called:
A. Interference
B. Spectroscopy
C. Dispersion
D. Reflection
9 Braking radiation causes:
A. Continuous spectrum
B. Line Spectrum
C. Band spectrum
D. Discrete specturm
10 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

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