ECAT Pre Engineering Physics Chapter 19 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 19 Dawn of Modern Physics

Try The MCQ's Test For Physics ECAT Pre Engineering Chapter 19 Dawn of Modern Physics

  • Total Questions15

  • Time Allowed20

Start Test Download PDF

Physics ECAT Pre Engineering Chapter 19 Dawn of Modern Physics

00:00
Question # 1

Intensity of light determines the:

Question # 2

An electron is accelerated through a potential difference of 50v. its de-Brogile wavelength is

Question # 3

The photoelectric effect, the maximum energy of photoelectrons depends on the

Question # 4

If you are moving at relativistic speed between two points that are a fixed distance apart, then the distance between the two points appers

Question # 5

The energy of a photon is represented by

Question # 6

Davision and Germer performed experiment to verify

Question # 7

Max plank founded a mathematical model resulting in an equation that describes the shape of observed black body radiation curves exactly, in

Question # 8

Practically the quantity v/c is always:

Question # 9

the dilation of time applies to the timing processes which are:

Question # 10

In process of annihilation of matter, the two photons produced move in opposite direction to converse

Question # 11

The existence of position was predicted by Dirace in

Question # 12

Compton derived an expression to find compton shift by applying to the process, the law of conservation of:

Question # 13

Albert Einstein got the Nobel prize in physics for his explanation of photoelectric effect in

Question # 14

A particle having mass and charge equal to that of an electron is called:

Question # 15

Wien's constant is measured in:

Submit

Prepare Complete Set Wise Physics ECAT Pre Engineering Chapter 19 Dawn of Modern Physics MCQs Online With Answers


Topic Test

00:00
Submit

Top Scorers Of Physics ECAT Pre Engineering Chapter 19 Dawn of Modern Physics MCQ`s Test

  • F
    Farzand Shah Farzand Shah 01 - Jun - 2024 01 Min 03 Sec 60/60
  • D
    David Navid 28 - Mar - 2024 02 Min 29 Sec 60/60
  • M
    Maryam afzal Maryam afzal 25 - May - 2024 09 Min 18 Sec 60/60
  • A
    Arian Ahmed 09 - Mar - 2024 00 Min 27 Sec 55/60
  • C
    Chhabibullah1492 Habib 06 - Mar - 2024 05 Min 29 Sec 55/60
  • H
    Huzaifa Asim 26 - May - 2024 09 Min 46 Sec 55/60
  • B
    Bilal Javed 02 - Jun - 2024 03 Min 49 Sec 50/60
  • A
    Abdullah Zubair 08 - Jan - 2025 04 Min 17 Sec 50/60
  • M
    Muhammad Sufyan 01 - Jun - 2024 00 Min 08 Sec 45/60
  • M
    Maida Naveed 24 - May - 2024 03 Min 14 Sec 45/60
  • U
    umaima mubashar 31 - May - 2024 06 Min 17 Sec 45/60
  • F
    Fiza Saleem 03 - Dec - 2024 09 Min 36 Sec 45/60
  • T
    Tamshi Sohail 02 - May - 2024 03 Min 48 Sec 40/60
  • R
    rubina kousar 01 - Jun - 2024 04 Min 22 Sec 40/60
  • J
    Javeria Rajput 03 - Jun - 2024 05 Min 50 Sec 40/60

ECAT Physics Chapter 19 Important MCQ's

Sr.# Question Answer
1 Electromagnetic radiation or photons interact with matter in
A. two distinct ways
B. three distinct ways
C. four distinct ways
D. five distinct ways
2 G.P. Thomson observer experimentally that electrons and neutrons possess
A. particle-like properties
B. wave-like properties
C. neither particle nor wave like properties
D. none of these
3 Position was discovered by Carl Anderson in
A. 1920
B. 1925
C. 1928
D. 1932
4 If the radius of first orbit of hydrogen atom is 0.53° A the radius of second orbit will be
A. 2.120°A
B. 0.212°A
C. 21.2°A
D. 0.14°
a
5 Absolute motion cannot be detected
A. in its own frame of references
B. in a different frame of references
C. both in its frame and different frame of references
D. none of these
6 When low energy photon interact with a metal,which of the following effect is likely to be taken place
A. pair production
B. photoelectric
C. Compton effect
D. None of these
7 The unit of work function is:
A. Joule
B. Electron volt
C. That of threshold frequency
D. Both (A) and (B)
8 In order to produce pair production, a photon must have a energy
A. 0.511 Me v
B. 0.256 Me v
C. 1.02 Me v
D. 0.956 Me v
9 Photocell is a device which converts
A. chemical energy into electrical energy
B. electrical energy into light energy
C. heat energy into electrical energy
D. light energy into electrical energy
10 An electron is accelerated through a potential difference of 50v. its de-Brogile wavelength is
A. 1.66 x 10-29m
B. 1.74 x 10-10cm
C. 17.4 x 10-6m
D. 1.74 x 10-10m

Test Questions

Is this page helpful?

Share your comments & questions here

Guest
  • hasnain

    hasnain

    30 May 2018

    no

    Like
    Reply