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 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
2	Davision and Germer performed experiment to verify	A. de-Brogile hypothesis B. theory of relativity C. Newton's law of gravitation D. Mass-energy relation
3	0.1 kg mass will be equivalent to the energy	A. 9 x 10¹⁵J B. 5 x 10⁸J C. 6 x 10¹⁶J D. 9 x 10^-16J
4	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
5	Position and momentum of a particle cannot both be measured simultaneously with perfect accuracy. This is the statement of	A. photoelectric effect B. pair production C. Compton effect D. uncertainty principle
6	Intensity of light determines the:	A. Energy of each photon B. Number of photons C. Speed of photons D. Size of photons
7	Compton derived an expression to find compton shift by applying to the process, the law of conservation of:	A. Energy only B. Momentum only C. Mass only D. Charge only
8	The value of the Stephen's constant for black body radiations is given by	A. 5.6 x 10⁸Wm^-2K^-4 B. 5.67 x 10^-8Wm^-2K^-4 C. 2.9 x 10^-3mK D. 2.9 x 10³mK
9	According to the Max plank, energy is redialed or absorbed in	A. discrete packets B. continuous waves C. either of them D. none of these
10	In process of annihilation of matter, the two photons produced move in opposite direction to converse	A. momentum B. charge C. energy D. mass

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 photon of radio-waves has energy of about

When platinum wire is heated, it appears cherry red at

A photon is considered to have

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

Compton was awarded Nobel prize in physics in

The existence of position was predicted by Dirace in

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

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

The special theory of relativity is based on the

According to the special theory of relativity, time is

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

The unit of work function is:

The whole shape of the black body spectrum for all wavelengths was explained by the formula proposed by

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

Photoelectrons are emitted when ultraviolet light falls on:

When a platinum wire is heated, it appears white at

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

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

The concept of direction is purely:

Compton studied the scattering of x-rays by loosely bound electrons from:

Newton's law of motion do not hold in

A non-inertial frame of reference is one, in which

The Nobel Prize on the explanation of photoelectric effect was awarded to:

Davision and Germer performed experiment to verify

The special theory of relativity treats problems invoving

Position was discovered by Carl Anderson in

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

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

The energy of photon 'E' is proported to

In order to produce pair production, a photon must have a energy

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