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

We can excite an atom by

Question # 2

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

Question # 3

The life time of metastable state is equal to

Question # 4

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

Question # 5

Coulomb multiplied by volt by volt gives the unit called:

Question # 6

The photocopying process is called:

Question # 7

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

Question # 8

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

Question # 9

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

Question # 10

Selenium is:

Question # 11

The electric field lines start from:

Question # 12

In flesh, light element like carbon, hydrogen and oxygen predominate. Three elements allows ______ amount of incident X-ray to pass through them

Question # 13

Gaussian surface is always:

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 The photocopying process is called:
A. Geography
B. Sonography
C. Xerography
D. Zerography
2 X-rays can penetrate in a solid matte through a distance of several:
A. Kilo metres
B. Metres
C. Centimeters
D. A few angstroms
3 The transitions of electrons in the hydrogen atom result in the emission of spectral lies in the:
A. Ultra red region
B. Visible region
C. Ultraviolet region
D. Any of these
4 The inkjet printer eject a thin stream of:
A. Water
B. Oil
C. Ink
D. Any above
5 CT scanning is the abbreviated name of
A. Computed Technology
B. Computed Technique
C. Computed Technology
D. Computerized Technique
6 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
7 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
8 In helium Neon Laser Neon = 15% and Helium = 85% used. The lasing gas this unit is
A. Helium
B. Neon
C. Both
D. None of these
9 Lyman series in the spectrum of hydrogen exists in the :
A. Infra-red region
B. Visible region
C. Ultraviolet region
D. Both(A) and (B)
10 The lasing or active medium in He-Ne laser discharge tube is:
A. Nitrogen
B. Helium
C. Hydrogen
D. Neon

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