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

The value of the metastable state for Neon is

Question # 2

A metastable stae:

Question # 3

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

Question # 4

The electric field lines start from:

Question # 5

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

Question # 6

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

Question # 7

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

Question # 8

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

Question # 9

X-rays produced in a tube operating at 105V. The speed of X-rays produced is

Question # 10

The inkjet printer eject a thin stream of:

Question # 11

The photocopying process is called:

Question # 12

Selenium is:

Question # 13

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

Question # 14

Lyman series in the spectrum of hydrogen exists in the :

Question # 15

The He-Ne laser discharge tube is filled with:

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 The first shell near the neucles is
A. L-shell
B. X-shell
C. N-shell
D. M-shell
2 The range of wavelengths of colurs in the visible colours is
A. 140 nm to 456 nm
B. 10 nm to 56 nm
C. 410 nm to 656 nm
D. 910 nm to 956 nm
3 The electric field lines start from:
A. Positive charge
B. Negative charge
C. Either A and B
D. Neutron
4 The value of the metastable state for Neon is
A. 20.66eV
B. 20.61eV
C. 19.23eV
D. 18.70eV
5 The process of formation of spectrum is called:
A. Interference
B. Spectroscopy
C. Dispersion
D. Reflection
6 Laser is a beam of:
A. Visible light
B. Infra red light
C. Ultra violet light
D. Violet light only
7 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
8 Balmer series was identified in:
A. 1685
B. 1785
C. 1885
D. 1985
9 Tick the series which lie/s in. the infra-red region.
A. Pfund series
B. Brackett series
C. Paschen series
D. All of these
10 The transitions of electrons in the hydrogen atom result in the emission of spectral lies in the:
A. Ultra red region
B. Visible region
C. Ultraviolet region
D. Any of these

Test Questions

Is this page helpful?

Share your comments & questions here

Guest

  • No comments yet. Be the first to comment!