ECAT Pre Computer Science Chapter 21 MCQ Test With Answer

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

Sr.#	Question	Answer
1	The distance travelled byα-particle in a medium before coming to rest, is called	A. range ofγ-particle B. range of neutrons C. range of particle D. none of these
2	An alpha particle has a charge of	A. +2e B. -2e C. -e D. +3e
3	Nucleus of a hydrogen atom may contain:	A. One neutron only B. Two protons and one neutron C. Two protons and two neutrons D. Aany of above
4	Pair production take place when energy ofγ-rays photon is	A. equal to 1.02 Mev- B. greater than 1.02 Mev C. less than 1.02 Mev D. none of these
5	Which of these is not a radiation detector	A. Wilson cloud chamber B. cyclotron acceleration C. Geiger Miller counter D. solid state detector
6	The missing mass which is converted to energy in the formation of nucleus, is called	A. packing fraction B. mass defect C. binding energy D. none of these
7	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
8	Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:	A. 50 B. 100 C. 150 D. 200
9	Fraction of the decaying atoms per unit time is called	A. decay atom B. decay element C. decay constant D. decay
10	Mass of neutron is	A. 1.67 x 10^-31kg B. 1.67 x 10^-27kg C. 9.1 x 10^-31kg D. 1.67 x 10^-19kg