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

00:00
Question # 1

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

Question # 2

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

Question # 3

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

Question # 4

X-ray are also known as

Question # 5

Braking radiation causes:

Question # 6

Graph of Black body radiation is example of

Question # 7

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

Question # 8

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

Question # 9

The shell closer to the nucleus is called:

Question # 10

Balmer series was identified in:

Question # 11

Laser is a beam of:

Question # 12

The minimum wavelength of X-rays produced of 1KV potential difference is applied across the anode and cathode of the tube is

Question # 13

The results of spectra obtained by Balmer were expressed in 1896 by:

Question # 14

The life time of metastable state is equal to

Question # 15

Photons must have energy equal to

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ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 Static electricity is produced by the transfer of:
A. Electrons
B. Protons
C. One fluid
D. Two fluid
2 Tick the series which lie/s in. the infra-red region.
A. Pfund series
B. Brackett series
C. Paschen series
D. All of these
3 The results of spectra obtained by Blamer were expressed in 1896 by
A. Bohr
B. Rydberg
C. Planck
D. Rutherford
4 CT scanning is the abbreviated name of
A. Computed Technology
B. Computed Technique
C. Computed Technology
D. Computerized Technique
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 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 X-ray are also known as
A. Roentgen rays
B. Maxwell rays
C. Plank range
D. Einstein rays
8 Laser is a beam of:
A. Visible light
B. Infra red light
C. Ultra violet light
D. Violet light only
9 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
A. Less than atmospheric pressure
B. Much less than atmospheric pressure
C. Greater than atmospheric pressure
D. Much greater than atmospheric pressure
10 The electric field lines start from:
A. Positive charge
B. Negative charge
C. Either A and B
D. Neutron

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  • Salmankhan

    Salmankhan

    01 Feb 2018

    Some mcqs having wrong answers.

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