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	The unit of work function is:	A. Joule B. Electron volt C. That of threshold frequency D. Both (A) and (B)
2	According to the special theory of relativity, time is	A. absolute quantity B. not absolute quantity C. constant quantity D. none of these
3	Current, voltage, resistance measuring circuit is connected with the galvanometer with the help of switch, known as	A. ON switch B. off switch C. function switch D. none of these
4	The special theory of relativity is based on the	A. one postulate B. two postulates C. three postulates D. four postulates
5	A black body is	A. an ideal absorber B. an ideal radiator C. both of them D. none of them
6	Wien's constant is measured in:	A. Metre per kelviin B. Metre kelvin C. Kelvin per meter D. Joules
7	The idea of quantization of energy was proposed by:	A. Einstein B. Max.Planck C. Maxwell D. Bohr
8	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)
9	Davision and Germer performed experiment to verify	A. de-Brogile hypothesis B. theory of relativity C. Newton's law of gravitation D. Mass-energy relation
10	As the light shines on the metal surface, the electrons are ejected	A. slowly B. instantaneously C. either 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

An inertial frame is that frame in which

There is no way to detect:

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

The concept of direction and position are purely

The general theory of relativity treats problems involving

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

S.I. unit of planks constant is

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

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

The special theory of relativity is based on the

A high temperature, the proportion of shorter wavelengths radiation, emitted by the body

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

The energy of a photon in a beam of infrared radiation of wavelength 1240 nm is

Compton was awarded Nobel prize in physics in

The value of the plank's constant 'h' is given by

Photoelectrons are emitted when ultraviolet light falls on:

The idea of quantization of energy was proposed by:

The photon of radio-waves has energy of about

Electromagnetic -radiation means:

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

The value of threshold frequency for different metals is

the symbol to be used in relativity problems denotes:

An electron is accelerated through a potential difference of 50v. its de-Brogile wavelength is

Which of the following is not an example of intertial frame

Electromagnetic radiation or photons interact with matter in

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

Wien's constant is measured in:

The special theory of relatively treats the problems involving:

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

According to Einstein, with the great increase in the speed of the body, the relativistic mass of the body

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ECAT Physics Chapter 19 Important MCQ's

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