ECAT Pre Computer Science Chapter 20 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 20 Atomic Spectra

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

  • Total Questions15

  • Time Allowed20

Start Test Download PDF

ECAT Physics Chapter 20 Atomic Spectra

00:00
Question # 1

A metastable stae:

Question # 2

Graph of Black body radiation is example of

Question # 3

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

Question # 4

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

Question # 5

Selenium is:

Question # 6

The formula of Brackett series can be obtained by putting in the general formula, the value of n equal to:

Question # 7

CT scanning is the abbreviated name of

Question # 8

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

Question # 9

The inkjet printer eject a thin stream of:

Question # 10

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

Question # 11

The photocopying process is called:

Question # 12

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

Question # 13

X-ray are also known as

Question # 14

Photons must have energy equal to

Question # 15

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

Submit

Prepare Complete Set Wise ECAT Physics Chapter 20 Atomic Spectra MCQs Online With Answers


Topic Test

00:00
Submit

Top Scorers Of ECAT Physics Chapter 20 Atomic Spectra MCQ`s Test

  • H
    Heer 07 - Jan - 2024 00 Min 36 Sec 60/60
  • U
    Umer Usman 09 - Mar - 2024 01 Min 35 Sec 60/60
  • I
    Ismailkhan Khanlala 17 - Aug - 2023 00 Min 42 Sec 55/60
  • F
    Fadi King 04 - Nov - 2025 01 Min 24 Sec 52/60
  • A
    Atal Khan 15 - Aug - 2023 00 Min 24 Sec 50/60
  • U
    Unknown 07 - Jan - 2024 01 Min 10 Sec 50/60
  • Z
    Zahida Attique 21 - May - 2024 01 Min 29 Sec 50/60
  • Z
    Zia Ullah Chahal 08 - Mar - 2024 02 Min 07 Sec 45/60
  • U
    Understand Islam Understand Islam 16 - Jul - 2024 00 Min 03 Sec 40/60
  • S
    Sanjana Athwani 19 - Jan - 2024 03 Min 10 Sec 40/60
  • S
    Shaheer Mustafa 07 - Mar - 2024 03 Min 29 Sec 40/60
  • B
    Bushra Rehmat 14 - Jul - 2023 03 Min 29 Sec 40/60
  • A
    Abdullah Baloch 10 - Aug - 2024 03 Min 51 Sec 40/60
  • M
    Mian House 31 - May - 2024 04 Min 11 Sec 40/60
  • M
    MusiCore 20 - Mar - 2023 04 Min 38 Sec 40/60

ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 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
2 The lasing or active medium in He-Ne laser discharge tube is:
A. Nitrogen
B. Helium
C. Hydrogen
D. Neon
3 CT scanning is the abbreviated name of
A. Computed Technology
B. Computed Technique
C. Computed Technology
D. Computerized Technique
4 The life time of metastable state is equal to
A. Life time of excited state
B. Greater than by excited state
C. Zero
D. Less than by excited state
5 The spectrum emitted from hydrogen filled discharge tube is:
A. Line spectrum
B. Discrete spectrum
C. And spectrum
D. Absorption spectrum
6 Lyman series in the spectrum of hydrogen exists in the :
A. Infra-red region
B. Visible region
C. Ultraviolet region
D. Both(A) and (B)
7 Ultraviolet region lies in ______ series
A. Layman
B. Balmer
C. P fund
D. B racket
8 The minimum wavelength of X-rays produced of 1KV potential difference is applied across the anode and cathode of the tube is
A. 1.24 x 10-10m
B. 7.92 x 10-20m
C. 2.78 x 10-14m
D. 3.88 x 10-11m
9 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
10 The natural arrangement of colours in the spectrum of white light spectrum is
A. VIBGYOR
B. ROYBGIV
C. ROYBIGV
D. BIGROYV

Test Questions

Is this page helpful?

Share your comments & questions here

Guest

  • No comments yet. Be the first to comment!