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

Physics ECAT Pre Engineering Chapter 19 Dawn of Modern Physics Physics Online Test

Sr. #	Questions	Answers Choice
1	When low energy photon interact with a metal,which of the following effect is likely to be taken place	pair production photoelectric Compton effect None of these
2	Compton was awarded Nobel prize in physics in	1921 1923 1925 1927
3	In the compton's effect, it is found that the wavelength of incident x-rays is	greater than the wavelength of scattered x-rays equal to the wavelength of scattered x-rays less than the wavelength of scattered x-rays any one of these
4	Albert Einstein got the Nobel prize in physics for his explanation of photoelectric effect in	1916 1919 1921 1923
5	According to the electromagnetic wave theory of light, increasing the intensity of incident light should increase the	number of photoelectrons size of the photoelectrons charge on photoelectrons K.E of photoelectrons
6	As the light shines on the metal surface, the electrons are ejected	slowly instantaneously either of these none of these
7	The value of threshold frequency for different metals is	different same may be different or may be same none of these
8	There is certain frequency below which no electrons are emitted from the metal surface, this frequency is known as	maximum frequency minimum frequency threshold frequency all of these
9	The photoelectric effect, the maximum energy of photoelectrons depends on the	particular metal surface frequency of incident light both of them none of them
10	When monochromatic light is allowed to fall on cathode, it begins to emit electrons, these electrons are called	thermoionic electrons free electrons photoelectrons slow electrons
11	The emission of electrons from a metal surface when exposed to light of suitable frequency is called the	pair production Compton effect photoelectric effect relativity
12	Electromagnetic radiation or photons interact with matter in	two distinct ways three distinct ways four distinct ways five distinct ways
13	The whole shape of the black body spectrum for all wavelengths was explained by the formula proposed by	Max plank Newton Einstein J.J. Thomson
14	The analysis of the distribution of wavelengths of the radiation emitted from a hot body set the foundation of new mechanics, known as	classical mechanics Newtonian mechanics quantum mechanics statistical mechanics
15	The energy of a photon in a beam of infrared radiation of wavelength 1240 nm is	100 ev 10<sup>6</sup>e v 10<sup>3</sup>e v 1.0 e v

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