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	Compton studied the scattering of x-rays by loosely bound electrons from:	A. NaCl crystal B. Graphite crystal C. Zirconia D. Copper crystal
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	Wien's constant is measured in:	A. Metre per kelviin B. Metre kelvin C. Kelvin per meter D. Joules
4	The concept of direction and position are purely	A. absolute B. relative C. absolute or relative D. none of these
5	Photoelectrons are emitted when ultraviolet light falls on:	A. Casium B. Silver C. Potassium D. Any of these
6	The inside cavity of the black body is	A. painted white B. painted silver C. blackened with soot D. painted red
7	From the theory of relativity, momentum p of the photon is related to energy as	A. p = hfc B. p = hf/c C. p = f(hc,f) D. p = cf/h
8	When a platinum wire is heated, it appears yellow at	A. 1600°C B. 900°C C. 1100°C D. 1300°C
9	Albert Einstein got the Nobel prize in physics for his explanation of photoelectric effect in	A. 1916 B. 1919 C. 1921 D. 1923
10	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

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

Compton shift refers to:

The energy of a photon is represented by

If the radius of first orbit of hydrogen atom is 0.53° A the radius of second orbit will be

At the temperature, a body emits radiation which is principally

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

S.I. unit of planks constant is

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

According to Einstein, with the great increase in the speed of the body the relativistic length of the body

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

According to the special theory of relativity

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

A photon is considered to have

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

Compton derived an expression to find compton shift by applying to the process, the law of conservation of:

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

The value of threshold frequency for different metals is

Electromagnetic -radiation means:

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

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

Wave nature of particle was proposed by

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:

When platinum wire is heated, it appears cherry red at

Newton's law of motion do not hold in

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

Which one of the following physical quantities changes with relativistic speed

The length contraction happens only

The emission of electrons from a metal surface when exposed to light of suitable frequency is called the

Which of the following phenomenon proves the particle nature of light

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

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

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?

Share your comments & questions here