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	Converse of pair production is known as	A. Compton effect B. annihilation of matter C. photoelectric effect D. none of these
2	The threshold frequency of sodium is 6 x 10⁶MHz. The cut-off wavelength for this metal will be	A. 500 m B. 500 nm C. 500 km D. 500 cm
3	The inside cavity of the black body is	A. painted white B. painted silver C. blackened with soot D. painted red
4	A particle having mass and charge equal to that of an electron is called:	A. Proton B. Positron C. Pion D. Pi-meson
5	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
6	The concept of direction is purely:	A. Absolute B. Relative C. Relative to stars always D. Relative to the sun always
7	Victor de-Brogile received the Nobel prize in physics in	A. 1925 B. 1929 C. 1932 D. 1935
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	Compton was awarded Nobel prize in physics in	A. 1921 B. 1923 C. 1925 D. 1927
10	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

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

The special theory of relativity is based on:

A high temperature, the proportion of shorter wavelengths radiation, emitted by the body

G.P. Thomson observer experimentally that electrons and neutrons possess

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

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

Davision and Germer performed experiment to verify

The special theory of relatively treats the problems involving:

The mass of an object will be doubled at speed

Wave nature of particle was proposed by

Max plank received the Nobel Prize in physics for his discovery of energy quanta in

The ratio of energy E to the corresponding frequency (f) of the radiation (emitted or absorbed) is called:

Which one of the following physical quantities changes with relativistic speed

Due to relative motion of observer and the frame of reference of events, time always:

Position and momentum of a particle cannot both be measured simultaneously with perfect accuracy. This is the statement of

The energy of photon 'E' is proported to

The unit of work function is:

When a platinum wire is heated, it appears orange red at

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

Electromagnetic radiation or photons interact with matter in

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

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

In the compton's effect, it is found that the wavelength of incident x-rays is

The special theory of relativity is based on the

The existence of position was predicted by Dirace in

Position was discovered by Carl Anderson in

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

The energy of the 4th orbit in hydrogen atom is

According to the special theory of relativity, a moving clock

A photon is considered to have

When a position comes close to an electron they annihilate into photons such that

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