ECAT Pre Engineering Physics Chapter 20 MCQ Test With Answer

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

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

Question # 2

Laser is a beam of:

Question # 3

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

Question # 4

The range of wavelengths of colurs in the visible colours is

Question # 5

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

Question # 6

Ultraviolet region lies in ______ series

Question # 7

Braking radiation causes:

Question # 8

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

Question # 9

Tick the series which lies in the visible region:

Question # 10

The shell closer to the nucleus is called:

Question # 11

The photocopying process is called:

Question # 12

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

Question # 13

The process of formation of spectrum is called:

Question # 14

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

Question # 15

A metastable stae:

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 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)
2 Laser is a beam of:
A. Visible light
B. Infra red light
C. Ultra violet light
D. Violet light only
3 The electric field lines start from:
A. Positive charge
B. Negative charge
C. Either A and B
D. Neutron
4 Balmer series was identified in:
A. 1685
B. 1785
C. 1885
D. 1985
5 Tick the series which lie/s in. the infra-red region.
A. Pfund series
B. Brackett series
C. Paschen series
D. All of these
6 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
7 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
8 CT scanning is the abbreviated name of
A. Computed Technology
B. Computed Technique
C. Computed Technology
D. Computerized Technique
9 The shell closer to the nucleus is called:
A. N shell
B.
L shell
C. K shell
D. M shell
10 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

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