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

An electron of the hydrogen atom in the second orbit is called its:

Question # 2

Braking radiation causes:

Question # 3

The process of formation of spectrum is called:

Question # 4

The transitions of electrons in the hydrogen atom result in the emission of spectral lies in the:

Question # 5

We can excite an atom by

Question # 6

The electric field lines start from:

Question # 7

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

Question # 8

An compared to solid matter, a crack or an air bubble allows:

Question # 9

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

Question # 10

Photons must have energy equal to

Question # 11

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

Question # 12

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

Question # 13

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

Question # 14

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

Question # 15

The first shell near the neucles is

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 Ultraviolet region lies in ______ series
A. Layman
B. Balmer
C. P fund
D. B racket
2 The He-Ne laser discharge tube is filled with:
A. 85% He
B. 15% He
C. 50% He
D. 60% He
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 X-ray are also known as
A. Roentgen rays
B. Maxwell rays
C. Plank range
D. Einstein rays
5 The lasing or active medium in He-Ne laser discharge tube is:
A. Nitrogen
B. Helium
C. Hydrogen
D. Neon
6 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
7 The spectrum emitted from hydrogen filled discharge tube is:
A. Line spectrum
B. Discrete spectrum
C. And spectrum
D. Absorption spectrum
8 Spectrum represents the number of component colours present in certain light in terms of:
A. Wavelength
B. Frequency
C. Energy
D. Both (A) and (B)
9 CT scanning is the abbreviated name of
A. Computed Technology
B. Computed Technique
C. Computed Technology
D. Computerized Technique
10 Selenium is:
A. An insulator
B. A conductor
C. Both A and B
D. Excellent conductor

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