ECAT Pre General Science Chapter 19 online mcq test with answers for Physics chapter 19 (Dawn of Modern Physics)

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	Albert Einstein got the Nobel prize in physics for his explanation of photoelectric effect in	A. 1916 B. 1919 C. 1921 D. 1923
2	When a high energy photon interact with a metal, which of the following effect is most likely to be taken place	A. pair production B. photoelectric effect C. Compton effect D. None of these
3	The mass of an object will be doubled at speed	A. 1.6 x 10⁸ms^-1 B. 2.6 X 10⁸ms^-1 C. 2.6 x 10⁷ms^-1 D. 2.6 x 10⁹ms^-1
4	According to the special theory of relativity, a moving clock	A. runs faster B. runs slower C. neither runs faster nor slower D. all of these
5	If you are moving at relativistic speed between two points that are a fixed distance apart, then the distance between the two points appers	A. larger B. shorter C. equal 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	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
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	The value of threshold frequency for different metals is	A. different B. same C. may be different or may be same D. none of these
10	A high temperature, the proportion of shorter wavelengths radiation, emitted by the body	A. decreases B. first increases then decreases C. increases D. any one of them

Latest Educational News Stories

Pakistan's Largest Database of Colleges and Universities

BS Programs

University Past Papers

University Results

Exam Results 2024

Study Abroad Programs and Opportunities for Pakistani Students

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

ECAT Pre General Science Physics Chapter 19 Dawn of Modern Physics

When a position comes close to an electron they annihilate into

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

The general theory of relativity treats problems involving

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

The concept of direction is purely:

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

The Stephen-Boltzmann law for the black body radiation is given by

Compton shift refers to:

When a platinum wire is heated, it appears white at

The energy of a photon is represented by

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

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

The special theory of relativity is based on the

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

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

The positron was discovered by:

Current, voltage, resistance measuring circuit is connected with the galvanometer with the help of switch, known as

The speed of a pendulum is measured to be 3.0 s in the inertial reference frame of the pendulum. What is its period measured by an observer moving at a speed of 0.95 c with respect to the pendulum

Photoelectric effect takes place with a photon of:

The concept of direction and position are purely

According to the special theory of relativity, time is

The special theory of relativity treats problems invoving

0.1 kg mass will be equivalent to the energy

A photon is considered to have

the symbol to be used in relativity problems denotes:

Converse of pair production is known as

When platinum wire is heated, then at the temperature of 500 oC, it becomes:

The length contraction happens only

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

de-Broglies hypthesis was experimentally verified by

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

Set 1

Set 2

Set 3

Set 4

Set 5

Topic Test

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

ECAT Physics Chapter 19 Important MCQ's

Test Questions

Share your comments & questions here

When platinum wire is heated, then at the temperature of 500 ^oC, it becomes: