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

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ECAT Physics Chapter 19 Important MCQ's

Sr.#	Question	Answer
1	Position was discovered by Carl Anderson in	A. 1920 B. 1925 C. 1928 D. 1932
2	Photoelectrons are emitted when ultraviolet light falls on:	A. Casium B. Silver C. Potassium D. Any of these
3	G.P. Thomson observer experimentally that electrons and neutrons possess	A. particle-like properties B. wave-like properties C. neither particle nor wave like properties D. none of these
4	The energy of photon 'E' is proported to	A. The magnetic field H B. The electric field E C. Both the electric and magnetic field H and E D. Frequency
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	In process of annihilation of matter, the two photons produced move in opposite direction to converse	A. momentum B. charge C. energy D. mass
7	Photocell is a device which converts	A. chemical energy into electrical energy B. electrical energy into light energy C. heat energy into electrical energy D. light energy into electrical energy
8	Albert Einstein got the Nobel prize in physics for his explanation of photoelectric effect in	A. 1916 B. 1919 C. 1921 D. 1923
9	When a high energy photon interact with a metal, which of the following effect is most likely to be taken place	A. pair production B. photoelectric effect C. Compton effect D. None of these
10	The way through which electromagnetic radiations or photons interact with matter depends upon their:	A. Wavelength B. Frequency C. Energy D. Temperature

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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

According to the special theory of relativity, time is

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

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

The special theory of relativity is based on:

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

Newton's law of motion do not hold in

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

Photoelectrons are emitted when ultraviolet light falls on:

Intensity of light determines the:

Compton studied the scattering of x-rays by loosely bound electrons from:

Which of the following is not an example of intertial frame

Position was discovered by Carl Anderson in

According to the special theory of relativity, a moving clock

Wave nature of particle was proposed by

When a position comes close to an electron they annihilate into photons such that

The year when A.H. compton was awarded Nobel Prize is:

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

In the compton's effect, it is found that the wavelength of incident x-rays is

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

Compton shift refers to:

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

A non-inertial frame of reference is one, in which

Converse of pair production is known as

Wien's constant is measured in:

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

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

The length contraction happens only

The Stephen-Boltzmann law for the black body radiation is given by

The general theory of relativity treats problems involving

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

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ECAT Physics Chapter 19 Important MCQ's

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