ECAT Pre General Science Physics Chapter 19 MCQ Test With Answer

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

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

  • Total Questions30

  • Time Allowed30

Start Test Download PDF

ECAT Pre General Science Physics Chapter 19 Dawn of Modern Physics

00:00
Question # 1

An intertial frame of reference is a frame of reference which is

Question # 2

A black body is

Question # 3

Practically the quantity v/c is always:

Question # 4

The idea of quantization of energy was proposed by:

Question # 5

0.1 kg mass will be equivalent to the energy

Question # 6

According to the special theory of relativity

Question # 7

Position was discovered by Carl Anderson in

Question # 8

The mass 'm' of a body moving at 0.8 c (whose rest mass is mo) becomes

Question # 9

If A represents linear momentum and c, the velocity of light, then unit of pc in international system of units is:

Question # 10

The way through which electromagnetic radiations or photons interact with matter depends upon their:

Question # 11

Davision and Germer performed experiment to verify

Question # 12

Newton's law of motion do not hold in

Question # 13

There is certain frequency below which no electrons are emitted from the metal surface, this frequency is known as

Question # 14

The special theory of relativity is based on:

Question # 15

Compton was awarded Nobel prize in physics in

Question # 16

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

Question # 17

Victor de-Brogile received the Nobel prize in physics in

Question # 18

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

Question # 19

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

Question # 20

At the temperature, a body emits radiation which is principally

Question # 21

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

Question # 22

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

Question # 23

The concept of direction and position are purely

Question # 24

The unit of work function is:

Question # 25

From the theory of relativity, momentum p of the photon is related to energy as

Question # 26

According to the de-Brogile relation, an object of large mass and ordinary speed has

Question # 27

The energy of the 4th orbit in hydrogen atom is

Question # 28

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

Question # 29

The special theory of relatively treats the problems involving:

Question # 30

When a platinum wire is heated, it appears white at

Submit

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


Topic Test

00:00
Submit

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

  • A
    Asghar Ali 03 - Mar - 2021 10 Min 50 Sec 100/120
  • S
    shamsuddin 19 - Aug - 2021 10 Min 50 Sec 75/120
  • K
    khadim Hussain 03 - Mar - 2021 10 Min 50 Sec 75/120
  • A
    Ali ahmad 19 - Jul - 2018 09 Min 44 Sec 70/120
  • A
    Aarij 08 - Dec - 2024 02 Min 25 Sec 65/120
  • W
    Waleed Ahmed 26 - Feb - 2023 10 Min 00 Sec 65/120
  • Z
    Ziyad Rehman Sheikh 16 - Nov - 2022 07 Min 21 Sec 40/120
  • M
    maha 01 - Mar - 2023 04 Min 24 Sec 35/120

ECAT Physics Chapter 19 Important MCQ's

Sr.# Question Answer
1 The special theory of relatively treats the problems involving:
A. Inertial frames of reference
B. Non-inertial frames
C. Non-accelerated frame
D. Botha (A) and (C)
2 de-Broglies hypthesis was experimentally verified by
A. Maxwell
B. Compton
C. Einstein
D. Davison and Germer
3 The positron was discovered by:
A. In cosmic radiation
B. In 1932
C. By Carl Anderson
D. All above
4 When a platinum wire is heated, it appears orange red at
A. 500°C
B. 900°C
C. 1100°C
D. 1300°C
5 Which of the following phenomenon proves the particle nature of light
A. interference
B. diffraction
C. photoelectric effect
D. none of these
6 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
7 There is no way to detect:
A. Absolute uniform motion
B. Accelerated motion
C. State rest
D. State of motion
8 Compton shift refers to:
A. Photon
B. Meson
C. Proton
D. Positron
9 The existence of position was predicted by Dirace in
A. 1920
B. 1925
C. 1930
D. 1928
10 The emission of electrons from a metal surface when exposed to light of suitable frequency is called the
A. pair production
B. Compton effect
C. photoelectric effect
D. relativity

Test Questions

Is this page helpful?