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 energy of a photon is represented by	A. h/c² B. h/T C. hc² D. hf/c²
2	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
3	When a high energy photon interact with a metal, which of the following effect is most likely to be taken place	A. pair production B. photoelectric effect C. Compton effect D. None of these
4	If the radius of first orbit of hydrogen atom is 0.53° A the radius of second orbit will be	A. 2.120°A B. 0.212°A C. 21.2°A D. 0.14° a
5	A non-inertial frame of reference is one, in which	A. law of inertial is valid B. all laws of physics are the same in all frames C. a>0 or a<0 D. a=0
6	The special theory of relativity is based on:	A. Four postulates B. Three postulates C. Two postulates D. One postulate
7	The general theory of relativity treats problems involving	A. inertial frame of references B. accelerating frame of references C. both of these D. none of these
8	Max plank founded a mathematical model resulting in an equation that describes the shape of observed black body radiation curves exactly, in	A. 1890 B. 1895 C. 1900 D. 1905
9	The photon of radio-waves has energy of about	A. 1 Me V B. 1 Ke v C. 10^-10e v D. 10¹⁰e v
10	The value of threshold frequency for different metals is	A. different B. same C. may be different or may be same 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

According to the de-Brogile relation, an object of large mass and ordinary speed has

Absolute motion cannot be detected

Photocell is a device which converts

Electromagnetic radiation or photons interact with matter in

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

Electromagnetic -radiation means:

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

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

Photoelectrons are emitted when ultraviolet light falls on:

The intensity of emitted energy (with wavelength) radiated from a black body at different temperatures was initially measured by:

The value of threshold frequency for different metals is

Which of the following phenomenon proves the particle nature of light

When low energy photon interact with a metal,which of the following effect is likely to be taken place

Compton was awarded Nobel prize in physics in

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

When the atomic particle are moving with velocities approaching that of light:

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

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

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

If a material object moves with the speed of light 'C' its mass becomes

The mass of an object will be doubled at speed

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

The stopping voltage for a certain metal is 100 volts, then the work function for the cathode plate is

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

The energy of the 4th orbit in hydrogen atom is

The existence of position was predicted by Dirace in

According to the special theory of relativity

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

According to the special theory of relativity, time is

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

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?