ECAT Pre Engineering Physics Chapter 20 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 20 Atomic Spectra

Try The MCQ's Test For Physics ECAT Pre Engineering Chapter 20 Atomic Spectra

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Physics ECAT Pre Engineering Chapter 20 Atomic Spectra

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Question # 1

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

Question # 2

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

Question # 3

The value of the metastable state for Neon is

Question # 4

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 # 5

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

Question # 6

Gaussian surface is always:

Question # 7

Photons must have energy equal to

Question # 8

Ultraviolet region lies in ______ series

Question # 9

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

Question # 10

We can excite an atom by

Question # 11

The range of wavelengths of colurs in the visible colours is

Question # 12

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

Question # 13

Tick the series which lies in the visible region:

Question # 14

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

Question # 15

The process of formation of spectrum is called:

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 Gaussian surface is always:
A. Rectangular
B. Spherical
C. Cylinder
D. Box shape
2 Static electricity is produced by the transfer of:
A. Electrons
B. Protons
C. One fluid
D. Two fluid
3 Laser is a beam of:
A. Visible light
B. Infra red light
C. Ultra violet light
D. Violet light only
4 The shell closer to the nucleus is called:
A. N shell
B.
L shell
C. K shell
D. M shell
5 By CAT scans, we can detect the density difference of the order of:
A. 1%
B. 20%
C. 30%
D. 50%
6 Coulomb multiplied by volt by volt gives the unit called:
A. farad
B. Ohm
C. Second
D. joule
7 Selenium is:
A. An insulator
B. A conductor
C. Both A and B
D. Excellent conductor
8 The inkjet printer eject a thin stream of:
A. Water
B. Oil
C. Ink
D. Any above
9 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
10 CT scanning is the abbreviated name of
A. Computed Technology
B. Computed Technique
C. Computed Technology
D. Computerized Technique

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