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 special theory of relativity treats problems invoving	A. inertial frame of references B. accelerating frame of references C. both of these D. none of these
2	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
3	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
4	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)
5	A high temperature, the proportion of shorter wavelengths radiation, emitted by the body	A. decreases B. first increases then decreases C. increases D. any one of them
6	When a platinum wire is heated, it appears dull red at about	A. 500°C B. 900°C C. 1100°C D. 1300°C
7	According to the special theory of relativity, time is	A. absolute quantity B. not absolute quantity C. constant quantity D. none of these
8	The location and speed anywhere on earth can now be determined using relativistic effects by NAVISTAR to an accuracy of	A. 2 cm/s B. 20 cm/s C. 200 cm/s D. 2000 cm/s
9	Photoelectrons are emitted when ultraviolet light falls on:	A. Casium B. Silver C. Potassium D. Any of these
10	A photon is considered to have	A. Momentum B. Energy C. Wavelength D. All of the above

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 mass 'm' of a body moving at 0.8 c (whose rest mass is mo) becomes

A photon is considered to have

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

Momentum is a parameter associated with

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

In photoelectric effect the energy of ejected electrons depend on

the symbol to be used in relativity problems denotes:

Compton was awarded Nobel prize in physics in

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

Current, voltage, resistance measuring circuit is connected with the galvanometer with the help of switch, known as

The energy of photon 'E' is proported to

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

When platinum wire is heated, it appears cherry red at

Victor de-Brogile received the Nobel prize in physics in

Strictly speaking, the earth is:

The mass of an object will be doubled at speed

The Einstein's changes in length, mass and time are not observed in common life because

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

Position was discovered by Carl Anderson in

Which of the following phenomenon proves the particle nature of light

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

The value of threshold frequency for different metals is

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

The general theory of relativity treats problems involving

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 particle of mass 5.0 mg moves with a speed of 8.0 m/s. Its de-Brogile wavelength is

Pair production is the phenomenon in which

Photocell is a device which converts

There is no way to detect:

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

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

Share your comments & questions here