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	the symbol to be used in relativity problems denotes:	A. Dilated time B. Proper time C. Life time D. Half time
2	A bar 1.0 m in length and located along x-axix moves with a speed of 0.75 c with respect to a stationary observer. The length of the bar as measured by the stationary observer is	A. 1.66 m B. 1.0 m C. 0.66 m D. 2.66 m
3	de-Broglies hypthesis was experimentally verified by	A. Maxwell B. Compton C. Einstein D. Davison and Germer
4	The whole shape of the black body spectrum for all wavelengths was explained by the formula proposed by	A. Max plank B. Newton C. Einstein D. J.J. Thomson
5	A particle having mass and charge equal to that of an electron is called:	A. Proton B. Positron C. Pion D. Pi-meson
6	In process of annihilation of matter, the two photons produced move in opposite direction to converse	A. momentum B. charge C. energy D. mass
7	Due to relative motion of observer and the frame of reference of events, time always:	A. Dilates itself B. Contracts itself C. Stretches itself D. Both (A) and (C)
8	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)
9	Intensity of light determines the:	A. Energy of each photon B. Number of photons C. Speed of photons D. Size of photons
10	According to the special theory of relativity, time is	A. absolute quantity B. not absolute quantity C. constant quantity D. none 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

A photon is considered to have

The unit of work function is:

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

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

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

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

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

The photon of radio-waves has energy of about

Which one of the following physical quantities changes with relativistic speed

the symbol to be used in relativity problems denotes:

The concept of direction is purely:

When a platinum wire is heated, it appears white at

The value of the plank's constant 'h' is given by

The value of threshold frequency for different metals is

Absolute motion cannot be detected

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

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

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

Photoelectrons are emitted when ultraviolet light falls on:

de-Broglies hypthesis was experimentally verified by

The positron was discovered by:

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

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

According to the special theory of relativity, time is

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

Compton was awarded Nobel prize in physics in

If a body reaches a speed equal to the speed of light, then its mass will became

As compared to the distance measured by an observer on Earth, the distance from Earth to a star measured by an observer in a moving spaceship would seem:

The special theory of relativity treats problems invoving

The threshold frequency of sodium is 6 x 106MHz. The cut-off wavelength for this metal will be

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

Is this page helpful?

The threshold frequency of sodium is 6 x 10⁶MHz. The cut-off wavelength for this metal will be