ECAT Pre Computer Science Chapter 19 MCQ Test With Answer

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

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

  • Total Questions15

  • Time Allowed20

Start Test Download PDF

ECAT Physics Chapter 19 Dawn of Modern Physics

00:00
Question # 1

Electromagnetic radiation or photons interact with matter in

Question # 2

Absolute motion cannot be detected

Question # 3

When a platinum wire is heated, it appears dull red at about

Question # 4

According to the special theory of relativity, a moving clock

Question # 5

The special theory of relativity is based on the

Question # 6

The year when A.H. compton was awarded Nobel Prize is:

Question # 7

Max Planck received the Nobel Prize for his discovery of energy quants in:

Question # 8

The nature of radiations emitted by a hot body depends upon its:

Question # 9

The general theory of relativity treats problems involving

Question # 10

When monochromatic light is allowed to fall on cathode, it begins to emit electrons, these electrons are called

Question # 11

The location and speed anywhere on earth can now be determined using relativistic effects by NAVISTAR to an accuracy of

Question # 12

As the light shines on the metal surface, the electrons are ejected

Question # 13

The analysis of the distribution of wavelengths of the radiation emitted from a hot body set the foundation of new mechanics, known as

Question # 14

The mass of an object will be doubled at speed

Question # 15

Strictly speaking, the earth is:

Submit

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


Topic Test

00:00
Submit

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

  • A
    Anayat Ali 03 - Apr - 2024 00 Min 25 Sec 60/60
  • H
    HAMZA Shah 21 - Sep - 2021 00 Min 42 Sec 60/60
  • U
    Umer Usman 10 - Mar - 2024 01 Min 08 Sec 60/60
  • S
    Sana Hashim 23 - May - 2022 02 Min 21 Sec 55/60
  • T
    Tayyaba 28 - Feb - 2018 04 Min 27 Sec 55/60
  • A
    Abdullah Baloch 11 - Aug - 2024 04 Min 52 Sec 55/60
  • R
    Rabbia Munir 06 - Mar - 2024 02 Min 16 Sec 50/60
  • M
    MusiCore 15 - Mar - 2023 02 Min 27 Sec 50/60
  • M
    Muqadas Zahra 14 - Apr - 2022 02 Min 34 Sec 45/60
  • Z
    Zia Ullah Chahal 08 - Mar - 2024 01 Min 39 Sec 40/60
  • B
    Benjamin Joseph 01 - Mar - 2023 02 Min 51 Sec 40/60
  • A
    arbeel ejaz 09 - Mar - 2023 04 Min 07 Sec 40/60
  • F
    Farhan 07 - Jan - 2019 05 Min 18 Sec 40/60
  • N
    nageena safdar 08 - Jul - 2024 09 Min 20 Sec 40/60
  • U
    Unknown 01 - Mar - 2023 00 Min 19 Sec 35/60

ECAT Physics Chapter 19 Important MCQ's

Sr.# Question Answer
1 Victor de-Brogile received the Nobel prize in physics in
A. 1925
B. 1929
C. 1932
D. 1935
2 The analysis of the distribution of wavelengths of the radiation emitted from a hot body set the foundation of new mechanics, known as
A. classical mechanics
B. Newtonian mechanics
C. quantum mechanics
D. statistical mechanics
3 If A represents linear momentum and c, the velocity of light, then unit of pc in international system of units is:
A. Newton
B. Joule
C. Joule-Sec
D. Joule-s-1
4 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
5 The stopping voltage for a certain metal is 100 volts, then the work function for the cathode plate is
A. 100 J
B. 1.6 x 10-17J
C. 100 eV
D. 1.6 x 10-17eV
6 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
7 According to the de-Brogile relation, an object of large mass and ordinary speed has
A. very small wavelength
B. very large wavelength
C. very small frequency
D. all of these
8 In process of annihilation of matter, the two photons produced move in opposite direction to converse
A. momentum
B. charge
C. energy
D. mass
9 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
10 According to Einstein, with the great increase in the speed of the body, the relativistic mass of the body
A. Remains constant
B. Decreases
C. Increases to infinity
D. Reduced to zero

Test Questions

Share your comments & questions here

Guest

  • No comments yet. Be the first to comment!