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

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

Question # 2

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

Question # 3

Laser is a beam of:

Question # 4

The photocopying process is called:

Question # 5

Coulomb multiplied by volt by volt gives the unit called:

Question # 6

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

Question # 7

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

Question # 8

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

Question # 9

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

Question # 10

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

Question # 11

The He-Ne laser discharge tube is filled with:

Question # 12

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

Question # 13

Ultraviolet region lies in ______ series

Question # 14

Atoms of hydrogen gas can be excited by passing electric current through it when the gas is filled into the discharge tube at a pressure which is

Question # 15

The natural arrangement of colours in the spectrum of white light spectrum is

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 X-rays can penetrate in a solid matte through a distance of several:
A. Kilo metres
B. Metres
C. Centimeters
D. A few angstroms
2 Tick the series which lies in the visible region:
A. Lyman series
B. Balmer series
C. Paschen series
D. Brackett series
3 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
4 Coulomb multiplied by volt by volt gives the unit called:
A. farad
B. Ohm
C. Second
D. joule
5 The value of the metastable state for Neon is
A. 20.66eV
B. 20.61eV
C. 19.23eV
D. 18.70eV
6 By CAT scans, we can detect the density difference of the order of:
A. 1%
B. 20%
C. 30%
D. 50%
7 The photocopying process is called:
A. Geography
B. Sonography
C. Xerography
D. Zerography
8 If the distance between two charges is doubled,the force between them will become:
A. Double
B. Half
C. One third
D. One fourth
9 We can excite an atom by
A. Bombardment of particles
B. Radiating photons
C. Providing potential difference
D. All answer are true
10 The results of spectra obtained by Blamer were expressed in 1896 by
A. Bohr
B. Rydberg
C. Planck
D. Rutherford

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