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

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

Question # 2

The spectrum emitted from hydrogen filled discharge tube is:

Question # 3

Spectrum represents the number of component colours present in certain light in terms of:

Question # 4

The electric field lines start from:

Question # 5

A metastable stae:

Question # 6

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

Question # 7

Gaussian surface is always:

Question # 8

Tick the series which lies in the visible region:

Question # 9

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

Question # 10

Coulomb multiplied by volt by volt gives the unit called:

Question # 11

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

Question # 12

Laser is a beam of:

Question # 13

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

Question # 14

Graph of Black body radiation is example of

Question # 15

If the distance between two charges is doubled,the force between them will become:

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
  • M
    Muneeb ur Rehman 28 - Jun - 2026 01 Min 36 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

ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 Balmer series lies in that region of electromagnetic wave spectrum which is called:
A. Visible region
B. Invisible region
C. Infra-red region
D. ultraviolet region
2 Laser is a beam of:
A. Visible light
B. Infra red light
C. Ultra violet light
D. Violet light only
3 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)
4 Balmer series was identified in:
A. 1685
B. 1785
C. 1885
D. 1985
5 The shell closer to the nucleus is called:
A. N shell
B.
L shell
C. K shell
D. M shell
6 Coulomb multiplied by volt by volt gives the unit called:
A. farad
B. Ohm
C. Second
D. joule
7 The results of spectra obtained by Balmer were expressed in 1896 by:
A.
Bohr
B. Rydberg
C. Planck
D. Rutherford
8 By CAT scans, we can detect the density difference of the order of:
A. 1%
B. 20%
C. 30%
D. 50%
9 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
10 Ultraviolet region lies in ______ series
A. Layman
B. Balmer
C. P fund
D. B racket

Test Questions

Share your comments & questions here

Guest

  • No comments yet. Be the first to comment!