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	Momentum is a parameter associated with	A. wave motion B. particle motion C. neither wave nor particle motion D. none of these
2	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
3	A particle of mass 5.0 mg moves with a speed of 8.0 m/s. Its de-Brogile wavelength is	A. 1.66 m B. 1.66 x 10^-10m C. 1.66 x 10^-29cm D. 1.66 x 10^-29m
4	When a position comes close to an electron they annihilate into photons such that	A. each photon has energy 0.51 Me v B. each photon has energy 1.02 Me v C. each photon has energy 0.25 Me v D. none of these
5	According to the special theory of relativity	A. mass and energy are same entities B. mass and energy are same entities but interconverible C. mass and energy are different entities but interconverible D. mass and energy are different entities but non-interconveritble
6	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:	A. Smaller B. Lerger C. Same D. Much larger
7	Which of the following is not an example of intertial frame	A. a body placed on the surface of earth B. a body placed in a car moving with uniform velocity C. a body placed in a car moving with same acceleration D. none of these
8	Absolute motion cannot be detected	A. in its own frame of references B. in a different frame of references C. both in its frame and different frame of references D. none of these
9	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
10	The ratio of energy E to the corresponding frequency (f) of the radiation (emitted or absorbed) is called:	A. Wien's constant B. Stefen's constnat C. Planck's constant D. Boltzmann's constant

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

A black body is

According to the special theory of relativity, a moving clock

The energy of a photon in a beam of infrared radiation of wavelength 1240 nm is

S.I. unit of planks constant is

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

Compton was awarded Nobel prize in physics in

The existence of position was predicted by Dirace in

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

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

the dilation of time applies to the timing processes which are:

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

The energy of photon 'E' is proported to

Pair production is the phenomenon in which

Position and momentum of a particle cannot both be measured simultaneously with perfect accuracy. This is the statement of

The nature of radiations emitted by a hot body depends upon its:

The mass of an object will be doubled at speed

When monochromatic light is allowed to fall on cathode, it begins to emit electrons, these electrons are called

From the theory of relativity, momentum p of the photon is related to energy as

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

Intensity of light determines the:

The idea of quantization of energy was proposed by:

At the temperature, a body emits radiation which is principally

Momentum is a parameter associated with

Wien's constant is measured in:

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

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

The special theory of relativity is based on:

Photoelectrons are emitted when ultraviolet light falls on:

0.1 kg mass will be equivalent to the 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?