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

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

Question # 2

The range of wavelengths of colurs in the visible colours is

Question # 3

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

Question # 4

The photocopying process is called:

Question # 5

The holes created in the L and M shells are occupied by transitions of:

Question # 6

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

Question # 7

Selenium is:

Question # 8

The He-Ne laser discharge tube is filled with:

Question # 9

Balmer series was identified in:

Question # 10

CT scanning is the abbreviated name of

Question # 11

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

Question # 12

X-ray are also known as

Question # 13

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

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 Balmer series was identified in:
A. 1685
B. 1785
C. 1885
D. 1985
2 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
3 Tick the series which lie/s in. the infra-red region.
A. Pfund series
B. Brackett series
C. Paschen series
D. All of these
4 The range of wavelengths of colurs in the visible colours is
A. 140 nm to 456 nm
B. 10 nm to 56 nm
C. 410 nm to 656 nm
D. 910 nm to 956 nm
5 Energy required by an electron revolving in certain orbit to jump to an excited state is called:
A. Ionization energy
B. Ionization potential
C. Excitation energy
D. Excitation potential
6 The first series which was identified in the spectrum of hydrogen is called:
A. Lyman series
B. Balmer series
C. Paschen series
D. Brackett series
7 Braking radiation causes:
A. Continuous spectrum
B. Line Spectrum
C. Band spectrum
D. Discrete specturm
8 The lasing or active medium in He-Ne laser discharge tube is:
A. Nitrogen
B. Helium
C. Hydrogen
D. Neon
9 The photocopying process is called:
A. Geography
B. Sonography
C. Xerography
D. Zerography
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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