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

Ultraviolet region lies in ______ series

Question # 2

The first shell near the neucles is

Question # 3

Photons must have energy equal to

Question # 4

Tick the series which lies in the visible region:

Question # 5

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

Question # 6

The transitions of electrons in the hydrogen atom result in the emission of spectral lies in the:

Question # 7

Laser is a beam of:

Question # 8

The photocopying process is called:

Question # 9

The value of the metastable state for Neon is

Question # 10

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

Question # 11

The spectrum emitted from hydrogen filled discharge tube is:

Question # 12

Coulomb multiplied by volt by volt gives the unit called:

Question # 13

Selenium is:

Question # 14

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

Question # 15

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

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 Braking radiation causes:
A. Continuous spectrum
B. Line Spectrum
C. Band spectrum
D. Discrete specturm
2 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
3 The process of formation of spectrum is called:
A. Interference
B. Spectroscopy
C. Dispersion
D. Reflection
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 first shell near the neucles is
A. L-shell
B. X-shell
C. N-shell
D. M-shell
6 In flesh, light element like carbon, hydrogen and oxygen predominate. Three elements allows ______ amount of incident X-ray to pass through them
A. Small
B. Greater
C. Equal
D. Sometimes
7 The lasing or active medium in He-Ne laser discharge tube is:
A. Nitrogen
B. Helium
C. Hydrogen
D. Neon
8 The results of spectra obtained by Balmer were expressed in 1896 by:
A.
Bohr
B. Rydberg
C. Planck
D. Rutherford
9 The inkjet printer eject a thin stream of:
A. Water
B. Oil
C. Ink
D. Any above
10 Coulomb multiplied by volt by volt gives the unit called:
A. farad
B. Ohm
C. Second
D. joule

Test Questions