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

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Asghar Ali 03 - Mar - 2021 10 Min 50 Sec 100/120
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khadim Hussain 03 - Mar - 2021 10 Min 50 Sec 75/120
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Ali ahmad 19 - Jul - 2018 09 Min 44 Sec 70/120
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Aarij 08 - Dec - 2024 02 Min 25 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	Compton studied the scattering of x-rays by loosely bound electrons from:	A. NaCl crystal B. Graphite crystal C. Zirconia D. Copper crystal
2	According to the special theory of relativity, a moving clock	A. runs faster B. runs slower C. neither runs faster nor slower D. all of these
3	In process of annihilation of matter, the two photons produced move in opposite direction to converse	A. momentum B. charge C. energy D. mass
4	Electromagnetic radiation or photons interact with matter in	A. two distinct ways B. three distinct ways C. four distinct ways D. five distinct ways
5	The photon of radio-waves has energy of about	A. 1 Me V B. 1 Ke v C. 10^-10e v D. 10¹⁰e v
6	Max plank received the Nobel Prize in physics for his discovery of energy quanta in	A. 1900 B. 1906 C. 1912 D. 1918
7	S.I. unit of planks constant is	A. J-s^-1 B. J.s C. J.s^-2 D. J.s²
8	Compton was awarded Nobel prize in physics in	A. 1921 B. 1923 C. 1925 D. 1927
9	Due to relative motion of observer and the frame of reference of events, time always:	A. Dilates itself B. Contracts itself C. Stretches itself D. Both (A) and (C)
10	Compton shift refers to:	A. Photon B. Meson C. Proton D. Positron

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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

Davision and Germer performed experiment to verify

The way through which electromagnetic radiations or photons interact with matter depends upon their:

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

Electromagnetic radiation or photons interact with matter in

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

With the help of 50 K v electron microscope, a resolution of

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

The Nobel Prize on the explanation of photoelectric effect was awarded to:

When a position comes close to an electron they annihilate into

The idea of quantization of energy was proposed by:

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

When a platinum wire is heated, it appears dull red at about

When a platinum wire is heated, it appears yellow at

Strictly speaking, the earth is:

The general theory of relativity treats problems involving

If the radius of first orbit of hydrogen atom is 0.53° A the radius of second orbit will be

The ratio of energy E to the corresponding frequency (f) of the radiation (emitted or absorbed) is called:

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

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

Wien's constant is measured in:

A black body is

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

The length contraction happens only

Position was discovered by Carl Anderson in

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

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

Intensity of light determines the:

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

Compton was awarded Nobel prize in physics in

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

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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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