ECAT Pre General Science Physics Chapter 20 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 20 Atomic Spectra

Try The MCQ's Test For ECAT Pre General Science Physics Chapter 20 Atomic Spectra

  • Total Questions30

  • Time Allowed30

Start Test Download PDF

ECAT Pre General Science Physics Chapter 20 Atomic Spectra

00:00
Question # 1

Consider a photon of continuous X-ray and a photon of characteristics X-ray of same wavelength. Which of the following is/are different for the two photons

Question # 2

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

Question # 3

Coulomb multiplied by volt by volt gives the unit called:

Question # 4

By CAT scans, we can detect the density difference of the order of:

Question # 5

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

Question # 6

The process of formation of spectrum is called:

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

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

Question # 9

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

Question # 10

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

Question # 11

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

Question # 12

The photocopying process is called:

Question # 13

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

Question # 14

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

Question # 15

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

Question # 16

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

Question # 17

Photons must have energy equal to

Question # 18

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

Question # 19

The shell closer to the nucleus is called:

Question # 20

The first series which was identified in the spectrum of hydrogen is called:

Question # 21

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

Question # 22

The lasing or active medium in He-Ne laser discharge tube is:

Question # 23

The spectrum emitted from hydrogen filled discharge tube is:

Question # 24

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

Question # 25

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

Question # 26

Static electricity is produced by the transfer of:

Question # 27

Selenium is:

Question # 28

Tick the series which lies in the visible region:

Question # 29

Ultraviolet region lies in ______ series

Question # 30

The inkjet printer eject a thin stream of:

Submit

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


Topic Test

00:00
Submit

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

  • R
    Rabeel Younas 06 - Jun - 2024 01 Min 25 Sec 120/120
  • H
    Hamza Mukhtair 14 - Jul - 2022 06 Min 02 Sec 85/120
  • H
    haseeb 12 - Sep - 2021 11 Min 12 Sec 65/120
  • M
    M Abduullah 22 - Apr - 2021 13 Min 54 Sec 55/120
  • W
    waqarasghar 27 - Feb - 2019 14 Min 08 Sec 55/120
  • U
    umar 12 - Aug - 2021 10 Min 50 Sec 30/120
  • M
    muskan mehboob 10 - May - 2021 10 Min 50 Sec 30/120
  • A
    Aleem Tahir 20 - Apr - 2021 10 Min 50 Sec 20/120
  • I
    ifrah Sheerazi 24 - Jun - 2021 10 Min 50 Sec 15/120
  • H
    Hassan Ali 23 - Feb - 2023 10 Min 50 Sec 0/120

ECAT Physics Chapter 20 Important MCQ's

Sr.# Question Answer
1 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
2 Braking radiation causes:
A. Continuous spectrum
B. Line Spectrum
C. Band spectrum
D. Discrete specturm
3 By CAT scans, we can detect the density difference of the order of:
A. 1%
B. 20%
C. 30%
D. 50%
4 Laser is a beam of:
A. Visible light
B. Infra red light
C. Ultra violet light
D. Violet light only
5 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
6 Gaussian surface is always:
A. Rectangular
B. Spherical
C. Cylinder
D. Box shape
7 In helium Neon Laser Neon = 15% and Helium = 85% used. The lasing gas this unit is
A. Helium
B. Neon
C. Both
D. None of these
8 We can excite an atom by
A. Bombardment of particles
B. Radiating photons
C. Providing potential difference
D. All answer are true
9 Photons must have energy equal to
A. ev
B. En
C. hf
D. None of these
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?