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 Class Physics Chapter 19 Important MCQ's

Sr.#	Question	Answer
1	In photoelectric effect the energy of ejected electrons depend on	A. The frequency B. The intensity C. Both frequency and intensity D. None of these
2	Max Planck received the Nobel Prize for his discovery of energy quants in:	A. 1718 AD B. 1918 AH C. 1818 AD D. 1918 AD
3	When a platinum wire is heated, it appears yellow at	A. 1600°C B. 900°C C. 1100°C D. 1300°C
4	The Nobel Prize on the explanation of photoelectric effect was awarded to:	A. Max. Planck B. Maxwell C. Bohr D. Rutherford
5	Strictly speaking, the earth is:	A. An accelerated frame of reference B. A non-inertial frame of reference C. An inertial frame of reference D. ^{A non-accelerated frame of reference}
6	Which one of the following physical quantities changes with relativistic speed	A. Length B. Mass C. Time D. All of the above
7	The concept of direction and position are purely	A. absolute B. relative C. absolute or relative D. none of these
8	The photon of radio-waves has energy of about	A. 1 Me V B. 1 Ke v C. 10^-10e v D. 10¹⁰e v
9	When platinum wire is heated, then at the temperature of 500 ^oC, it becomes:	A. Yellow B. Orange red C. Dull red D. White
10	Photoelectrons are emitted when ultraviolet light falls on:	A. Casium B. Silver C. Potassium D. Any 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 idea of quantization of energy was proposed by:

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

Pair production is the phenomenon in which

Compton shift refers to:

Davision and Germer performed experiment to verify

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

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

In photoelectric effect the energy of ejected electrons depend on

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

The photon of radio-waves has energy of about

Converse of pair production is known as

The existence of position was predicted by Dirace in

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

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

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

An inertial frame is that frame in which

The length contraction happens only

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

Victor de-Brogile received the Nobel prize in physics in

The value of the Stephen's constant for black body radiations is given by

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

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

The positron was discovered by:

According to the special theory of relativity

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

the symbol to be used in relativity problems denotes:

According to the electromagnetic wave theory of light, increasing the intensity of incident light should increase the

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

Which of the following phenomenon proves the particle nature of light

The energy of photon 'E' is proported to

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 Class Physics Chapter 19 Important MCQ's

Test Questions

Is this page helpful?