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

  • Total Questions15

  • Time Allowed20

Start Test Download PDF

Physics ECAT Pre Engineering Chapter 20 Atomic Spectra

00:00
Question # 1

The process of formation of spectrum is called:

Question # 2

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

Question # 3

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

Question # 4

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

Question # 5

CT scanning is the abbreviated name of

Question # 6

The value of the metastable state for Neon is

Question # 7

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

Question # 8

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

Question # 9

Lyman series in the spectrum of hydrogen exists in the :

Question # 10

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

Question # 11

X-ray are also known as

Question # 12

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

Question # 13

Graph of Black body radiation is example of

Question # 14

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

Question # 15

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

Submit

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


Topic Test

00:00
Submit

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

  • A
    Arian Ahmed 12 - Mar - 2024 00 Min 03 Sec 60/60
  • F
    Farzand Shah Farzand Shah 01 - Jun - 2024 00 Min 44 Sec 60/60
  • B
    Bilal Javed 07 - Mar - 2024 01 Min 33 Sec 60/60
  • H
    Huzaifa Asim 26 - May - 2024 13 Min 32 Sec 60/60
  • M
    M Umer Arain 24 - Dec - 2024 00 Min 07 Sec 55/60
  • F
    Fizza Khalid 03 - Mar - 2024 01 Min 13 Sec 55/60
  • A
    Anibullah Anib 07 - Mar - 2024 01 Min 57 Sec 55/60
  • T
    Tamshi Sohail 03 - May - 2024 02 Min 37 Sec 55/60
  • C
    Chhabibullah1492 Habib 07 - Mar - 2024 05 Min 43 Sec 55/60
  • M
    Malaika Waqar 23 - Apr - 2024 06 Min 21 Sec 55/60
  • S
    Shamshad 27 - May - 2024 01 Min 13 Sec 50/60
  • S
    Sammad Ali 30 - May - 2024 01 Min 20 Sec 50/60
  • A
    Ayesha Ch 06 - Mar - 2024 01 Min 33 Sec 50/60
  • M
    m imran 18 - May - 2024 02 Min 16 Sec 50/60
  • A
    Abdullah Zubair 11 - Jan - 2025 03 Min 10 Sec 45/60

ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 Braking radiation causes:
A. Continuous spectrum
B. Line Spectrum
C. Band spectrum
D. Discrete specturm
2 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
3 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
4 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
5 Photons must have energy equal to
A. ev
B. En
C. hf
D. None of these
6 The photocopying process is called:
A. Geography
B. Sonography
C. Xerography
D. Zerography
7 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
8 The first series which was identified in the spectrum of hydrogen is called:
A. Lyman series
B. Balmer series
C. Paschen series
D. Brackett series
9 The holes created in the L and M shells are occupied by transitions of:
A. Electrons from lower states
B. Electrons from higher state
C. Positrons from higher states
D. Electrons from K shell
10 Graph of Black body radiation is example of
A. Band spectra
B. Continuo's spectra
C. Line spectra
D. All

Test Questions

Is this page helpful?

Share your comments & questions here

Guest
  • Salmankhan

    Salmankhan

    01 Feb 2018

    Some mcqs having wrong answers.

    Like
    Reply