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

Braking radiation causes:

Question # 2

Gaussian surface is always:

Question # 3

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

Question # 4

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

Question # 5

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

Question # 6

CT scanning is the abbreviated name of

Question # 7

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

Question # 8

Balmer series was identified in:

Question # 9

Tick the series which lies in the visible region:

Question # 10

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

Question # 11

X-ray are also known as

Question # 12

The value of the metastable state for Neon is

Question # 13

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

Question # 14

The inkjet printer eject a thin stream of:

Question # 15

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

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 X-rays produced in a tube operating at 105V. The speed of X-rays produced is
A. 3 x 108m/s
B. 3.1 x 108m/s
C. 2.8 x 108m/s
D. 1.88 x 108m/s
2 In flesh, light element like carbon, hydrogen and oxygen predominate. Three elements allows ______ amount of incident X-ray to pass through them
A. Small
B. Greater
C. Equal
D. Sometimes
3 Coulomb multiplied by volt by volt gives the unit called:
A. farad
B. Ohm
C. Second
D. joule
4 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
5 Braking radiation causes:
A. Continuous spectrum
B. Line Spectrum
C. Band spectrum
D. Discrete specturm
6 Static electricity is produced by the transfer of:
A. Electrons
B. Protons
C. One fluid
D. Two fluid
7 Selenium is:
A. An insulator
B. A conductor
C. Both A and B
D. Excellent conductor
8 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
A. Less than atmospheric pressure
B. Much less than atmospheric pressure
C. Greater than atmospheric pressure
D. Much greater than atmospheric pressure
9 Tick the series which lies in the visible region:
A. Lyman series
B. Balmer series
C. Paschen series
D. Brackett series
10 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

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