ECAT Pre Engineering Physics Chapter 19 MCQ Test With Answer

Top Scorers Of Physics ECAT Pre Engineering Chapter 19 Dawn of Modern Physics MCQ`s Test

Sr.#	Question	Answer
1	Max plank founded a mathematical model resulting in an equation that describes the shape of observed black body radiation curves exactly, in	A. 1890 B. 1895 C. 1900 D. 1905
2	Compton shift refers to:	A. Photon B. Meson C. Proton D. Positron
3	The concept of direction is purely:	A. Absolute B. Relative C. Relative to stars always D. Relative to the sun always
4	The way through which electromagnetic radiations or photons interact with matter depends upon their:	A. Wavelength B. Frequency C. Energy D. Temperature
5	When a platinum wire is heated, it appears yellow at	A. 1600°C B. 900°C C. 1100°C D. 1300°C
6	In the compton's effect, it is found that the wavelength of incident x-rays is	A. greater than the wavelength of scattered x-rays B. equal to the wavelength of scattered x-rays C. less than the wavelength of scattered x-rays D. any one of these
7	An inertial frame is that frame in which	A. a>0 B. a=0 C. a<0 D. none of these
8	A particle having mass and charge equal to that of an electron is called:	A. Proton B. Positron C. Pion D. Pi-meson
9	The inside cavity of the black body is	A. painted white B. painted silver C. blackened with soot D. painted red
10	Wave nature of particle was proposed by	A. Einstein B. Plank C. De-Brogile D. Max well