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

The spectrum emitted from hydrogen filled discharge tube is:

Question # 2

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

Question # 3

The lasing or active medium in He-Ne laser discharge tube is:

Question # 4

The results of spectra obtained by Blamer were expressed in 1896 by

Question # 5

X-ray are also known as

Question # 6

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

Question # 7

The photocopying process is called:

Question # 8

A metastable stae:

Question # 9

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

Question # 10

CT scanning is the abbreviated name of

Question # 11

Photons must have energy equal to

Question # 12

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

Question # 13

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

Question # 14

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

Question # 15

Tick the series which lies in the visible region:

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 If the distance between two charges is doubled,the force between them will become:
A. Double
B. Half
C. One third
D. One fourth
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
A. Frequency
B. Penetrating power
C. Energy
D. Method of creation
3 The photocopying process is called:
A. Geography
B. Sonography
C. Xerography
D. Zerography
4 Balmer series was identified in:
A. 1685
B. 1785
C. 1885
D. 1985
5 An electron of the hydrogen atom in the second orbit is called its:
A. Ground state
B. Excited state
C. Ionized state
D. Any of these
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 Energy required by an electron revolving in certain orbit to jump to an excited state is called:
A. Ionization energy
B. Ionization potential
C. Excitation energy
D. Excitation potential
8 Photons must have energy equal to
A. ev
B. En
C. hf
D. None of these
9 The results of spectra obtained by Balmer were expressed in 1896 by:
A.
Bohr
B. Rydberg
C. Planck
D. Rutherford
10 A metastable stae:
A. Is an excited state
B. Is that in which excited electron is stable
C. Is that in which excited electron is usually unstable
D. Means a time interval of 10-8second

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