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 life time of metastable state is equal to

Question # 2

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

Question # 3

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

Question # 4

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

Question # 5

We can excite an atom by

Question # 6

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

Question # 7

The spectrum emitted from hydrogen filled discharge tube is:

Question # 8

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

Question # 9

Tick the series which lies in the visible region:

Question # 10

X-rays can penetrate in a solid matte through a distance of several:

Question # 11

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

Question # 12

Selenium is:

Question # 13

Gaussian surface is always:

Question # 14

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

Question # 15

Balmer series was identified in:

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
  • S
    suzi 11 - Feb - 2026 00 Min 45 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

ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 Ultraviolet region lies in ______ series
A. Layman
B. Balmer
C. P fund
D. B racket
2 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
3 The inkjet printer eject a thin stream of:
A. Water
B. Oil
C. Ink
D. Any above
4 The results of spectra obtained by Balmer were expressed in 1896 by:
A.
Bohr
B. Rydberg
C. Planck
D. Rutherford
5 The first shell near the neucles is
A. L-shell
B. X-shell
C. N-shell
D. M-shell
6 The results of spectra obtained by Blamer were expressed in 1896 by
A. Bohr
B. Rydberg
C. Planck
D. Rutherford
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 X-ray are also known as
A. Roentgen rays
B. Maxwell rays
C. Plank range
D. Einstein rays
9 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
10 The spectrum emitted from hydrogen filled discharge tube is:
A. Line spectrum
B. Discrete spectrum
C. And spectrum
D. Absorption spectrum

Test Questions

Is this page helpful?