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	Wien's constant is measured in:	A. Metre per kelviin B. Metre kelvin C. Kelvin per meter D. Joules
2	There is certain frequency below which no electrons are emitted from the metal surface, this frequency is known as	A. maximum frequency B. minimum frequency C. threshold frequency D. all of these
3	The special theory of relativity is based on:	A. Four postulates B. Three postulates C. Two postulates D. One postulate
4	Position and momentum of a particle cannot both be measured simultaneously with perfect accuracy. This is the statement of	A. photoelectric effect B. pair production C. Compton effect D. uncertainty principle
5	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	A. 1.66 m B. 1.0 m C. 0.66 m D. 2.66 m
6	At the temperature, a body emits radiation which is principally	A. of long wavelengths in the visible region B. of long wavelengths in the invisible infrared region C. of short wavelength in invisible ultraviolet region D. none of these
7	If a body reaches a speed equal to the speed of light, then its mass will became	A. zero B. very small C. infinity D. none of these
8	The energy of a photon is represented by	A. h/c² B. h/T C. hc² D. hf/c²
9	Photoelectrons are emitted when ultraviolet light falls on:	A. Casium B. Silver C. Potassium D. Any of these
10	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

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

Practically the quantity v/c is always:

The location and speed anywhere on earth can now be determined using relativistic effects by NAVISTAR to an accuracy of

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

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

When a platinum wire is heated, it appears orange red at

The energy of photon 'E' is proported to

The special theory of relativity treats problems invoving

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

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

Photoelectrons are emitted when ultraviolet light falls on:

The concept of direction is purely:

The photon of radio-waves has energy of about

Electromagnetic radiation or photons interact with matter in

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

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 inside cavity of the black body is

Compton was awarded Nobel prize in physics in

Photoelectric effect takes place with a photon of:

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

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

According to the special theory of relativity, a moving clock

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

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

Victor de-Brogile received the Nobel prize in physics in

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

The speed of a pendulum is measured to be 3.0 s in the inertial reference frame of the pendulum. What is its period measured by an observer moving at a speed of 0.95 c with respect to the pendulum

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

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

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

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

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