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	When platinum wire is heated, it appears cherry red at	A. 1600°C B. 900°C C. 1100°C D. 1300°C
2	The intensity of emitted energy (with wavelength) radiated from a black body at different temperatures was initially measured by:	A. Lummer B. Planck C. Pringsheim D. Both (A ) and (B)
3	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
4	The energy of the 4th orbit in hydrogen atom is	A. 2.5 ev B. - 3.5 ev C. -0.85 ev D. -13.6 ev
5	Newton's law of motion do not hold in	A. an accelerated frame of reference B. an unaccelerated frame of reference C. both of these D. none of these
6	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}
7	Which of the following phenomenon proves the particle nature of light	A. interference B. diffraction C. photoelectric effect D. none of these
8	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
9	Momentum is a parameter associated with	A. wave motion B. particle motion C. neither wave nor particle motion D. none of these
10	The special theory of relativity is based on the	A. one postulate B. two postulates C. three postulates D. four postulates

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 Max plank, energy is redialed or absorbed in

The length contraction happens only

S.I. unit of planks constant is

A photon is considered to have

Absolute motion cannot be detected

Photoelectric effect takes place with a photon of:

Newton's law of motion do not hold in

The photoelectric effect, the maximum energy of photoelectrons depends on the

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

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

In process of annihilation of matter, the two photons produced move in opposite direction to converse

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

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

Position was discovered by Carl Anderson in

If you are moving at relativistic speed between two points that are a fixed distance apart, then the distance between the two points appers

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

The concept of direction and position are purely

Wave nature of particle was proposed by

A black body is

The special theory of relatively treats the problems involving:

The idea of quantization of energy was proposed by:

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

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

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

When a platinum wire is heated, it appears white at

Wien's constant is measured in:

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

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

Strictly speaking, the earth is:

Which one of the following physical quantities changes with relativistic speed

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?