ECAT Pre General Science Chapter 19 online mcq test with answers for Physics chapter 19 (Dawn of Modern Physics)

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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 was awarded Nobel prize in physics in	A. 1921 B. 1923 C. 1925 D. 1927
2	Position was discovered by Carl Anderson in	A. 1920 B. 1925 C. 1928 D. 1932
3	Compton shift refers to:	A. Photon B. Meson C. Proton D. Positron
4	If you are moving at relativistic speed between two points that are a fixed distance apart, then the distance between the two points appers	A. larger B. shorter C. equal 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	The year when A.H. compton was awarded Nobel Prize is:	A. 1923 B. 1927 C. 1931 D. 1935
7	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
8	Pair production is the phenomenon in which	A. matter is converted into energy B. energy is converted into matter C. light is converted into electrical energy D. electrical energy is converted into light
9	If a material object moves with the speed of light 'C' its mass becomes	A. Equal to its rest mass B. Four times of its rest mass C. Double of its rest mass D. Infinite
10	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

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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

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

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

When a platinum wire is heated, it appears yellow at

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

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

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

The general theory of relativity treats problems involving

The energy of a photon is represented by

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

Absolute motion cannot be detected

Max plank received the Nobel Prize in physics for his discovery of energy quanta in

If you are moving at relativistic speed between two points that are a fixed distance apart, then the distance between the two points appers

Electromagnetic radiation or photons interact with matter in

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

In photoelectric effect the energy of ejected electrons depend on

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

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

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

When a position comes close to an electron they annihilate into

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

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

The photoelectric effect, the maximum energy of photoelectrons depends on the

When platinum wire is heated, then at the temperature of 500 oC, it becomes:

According to the special theory of relativity, a moving clock

de-Broglies hypthesis was experimentally verified by

A black body is

The special theory of relatively treats the problems involving:

Intensity of light determines the:

The photon of radio-waves has energy of about

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

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ECAT Physics Chapter 19 Important MCQ's

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When platinum wire is heated, then at the temperature of 500 ^oC, it becomes: