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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
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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
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Waleed Ahmed 26 - Feb - 2023 10 Min 00 Sec 65/120
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Ziyad Rehman Sheikh 16 - Nov - 2022 07 Min 21 Sec 40/120
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maha 01 - Mar - 2023 04 Min 24 Sec 35/120

ECAT Physics Chapter 19 Important MCQ's

Sr.#	Question	Answer
1	According to Einstein, with the great increase in the speed of the body, the relativistic mass of the body	A. Remains constant B. Decreases C. Increases to infinity D. Reduced to zero
2	Momentum is a parameter associated with	A. wave motion B. particle motion C. neither wave nor particle motion D. none of these
3	The value of the plank's constant 'h' is given by	A. 1.6 x 10^-19J B. 1.67 x 10^-27Kg C. 6.63 x 10³⁴Js D. 6.63 x 10^-34Js
4	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
5	S.I. unit of planks constant is	A. J-s^-1 B. J.s C. J.s^-2 D. J.s²
6	Photoelectric effect takes place with a photon of:	A. Very high energy B. Very low energy C. Low energy D. High energy
7	When the atomic particle are moving with velocities approaching that of light:	A. Newton's laws become valid B. Relativistic effects become prominent C. Botha(A) and (B) are valid D. Neither (A)nor (B)
8	Electromagnetic radiation or photons interact with matter in	A. two distinct ways B. three distinct ways C. four distinct ways D. five distinct ways
9	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
10	Max plank received the Nobel Prize in physics for his discovery of energy quanta in	A. 1900 B. 1906 C. 1912 D. 1918

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ECAT Pre General Science Physics Chapter 19 Dawn of Modern Physics

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 length contraction happens only

Victor de-Brogile received the Nobel prize in physics in

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

Electromagnetic radiation or photons interact with matter in

The concept of direction and position are purely

0.1 kg mass will be equivalent to the energy

An intertial frame of reference is a frame of reference which is

If A represents linear momentum and c, the velocity of light, then unit of pc in international system of units is:

When a platinum wire is heated, it appears yellow at

Absolute motion cannot be detected

The concept of direction is purely:

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

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

Intensity of light determines the:

A black body is

According to the special theory of relativity

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

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

According to the Max plank, energy is redialed or absorbed in

The energy of a photon is represented by

When platinum wire is heated, it appears cherry red at

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

In order to produce pair production, a photon must have a energy

Wien's constant is measured in:

Electromagnetic -radiation means:

de-Broglies hypthesis was experimentally verified by

The inside cavity of the black body is

Compton derived an expression to find compton shift by applying to the process, the law of conservation of:

The unit of work function is:

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Top Scorers Of ECAT Pre General Science Physics Chapter 19 Dawn of Modern Physics MCQ`s Test

ECAT Physics Chapter 19 Important MCQ's

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