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

A metastable stae:

Question # 2

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

Question # 3

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

Question # 4

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

Question # 5

The electric field lines start from:

Question # 6

Coulomb multiplied by volt by volt gives the unit called:

Question # 7

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

Question # 8

The photocopying process is called:

Question # 9

We can excite an atom by

Question # 10

Selenium is:

Question # 11

Tick the series which lies in the visible region:

Question # 12

In helium Neon Laser Neon = 15% and Helium = 85% used. The lasing gas this unit is

Question # 13

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 # 14

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

Question # 15

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

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 Tick the series which lie/s in. the infra-red region.
A. Pfund series
B. Brackett series
C. Paschen series
D. All of these
2 Coulomb multiplied by volt by volt gives the unit called:
A. farad
B. Ohm
C. Second
D. joule
3 Balmer series was identified in:
A. 1685
B. 1785
C. 1885
D. 1985
4 The electric field lines start from:
A. Positive charge
B. Negative charge
C. Either A and B
D. Neutron
5 CT scanning is the abbreviated name of
A. Computed Technology
B. Computed Technique
C. Computed Technology
D. Computerized Technique
6 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
7 The photocopying process is called:
A. Geography
B. Sonography
C. Xerography
D. Zerography
8 The lasing or active medium in He-Ne laser discharge tube is:
A. Nitrogen
B. Helium
C. Hydrogen
D. Neon
9 Static electricity is produced by the transfer of:
A. Electrons
B. Protons
C. One fluid
D. Two fluid
10 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

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