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	Fraction of the decaying atoms per unit time is called	A. decay atom B. decay element C. decay constant D. decay
2	Which of the following material has longer half life	A. radium B. polonium C. radium D. uranium
3	The unit of decay constant is:	A. Second B. Metre C. Hour D. Year
4	A pair of quark and antiquark makes a:	A. Meson B. Baryon C. Proton D. Neutron
5	Charge on proton is	A. 1.59 x 10^-9C B. 1.59 x 10^-7C C. -1.59 x 10^-19C D. 1.59 x 10^-19C
6	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
7	A particle having the mass of electron and charge of a proton is called a	A. photon B. position C. antiproton D. antineutrino
8	Mass of proton is of order of	A. 10^-31gm B. 10^-27kg C. 10^-24gm D. 10⁺²⁷kg
9	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
10	A mass spectrograph sort out	A. molecules B. atoms C. elements D. isotopes