ECAT Pre Engineering Physics Chapter 21 MCQ Test With Answer

Top Scorers Of Physics ECAT Pre Engineering Chapter 21 Nuclear Physics MCQ`s Test

Sr.#	Question	Answer
1	1 amu is equal to	A. 1.66 x 10^-24kg B. 1.66 x 10^-19kg C. 1.66 x 10^-34kg D. 1.66 x 10^-27kg
2	The emission of radiations take place in elements, having charge number greater than	A. 109 B. 82 C. 69 D. 52
3	Alfa particles are	A. hydrogen nuclei B. helium nuclei C. electrons D. photons
4	The unit of decay constant is	A. sex B. sec² C. sec^-1 D. sec^-2
5	The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains	A. 3 more neutrons B. 3 more electrons C. 3 more protons D. 3 more ions
6	The penetration power ofβ-particle is	A. zero B. less thanα-particle C. equal toα-particle D. greater thanα-particle
7	In wilson cloud chamber, the air becomes saturated with:	A. Alcohol vapours B. Water C. Helium gas D. Nitrogen gas
8	If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by	A. -4 B. 4 C. 2 D. 1
9	The number of all the protons and neutrons in a nucleus is known as	A. atomic number B. mass number C. charge number D. none of these
10	The unit of decay constant is:	A. Second B. Metre C. Hour D. Year