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	A pair of quark and antiquark makes a:	A. Meson B. Baryon C. Proton D. Neutron
2	Structure of the nucleus was explained by	A. J.J Thomson B. Bohr C. Millikan D. Rutherford
3	Neutrons are	A. positive charge B. negatively charged C. massless D. neutral
4	The rate of decay of a radioactive substance	A. decrease exponentially with time B. decreases linearly with time C. increases linearly with time D. increases exponentially with time
5	Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called	A. deuteron B. deterium C. protium D. tritium
6	Nuclei that have the same charge number but different mass number are called	A. isotones B. isomers C. isotopes D. isobars
7	Which are not the elementary particles?	A. Photons B. Leptons C. Hadrons D. Quarks
8	Fraction of the decaying atoms per unit time is called	A. decay atom B. decay element C. decay constant D. decay
9	For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is	A. A - Z B. A C. Z D. A + Z
10	Mass of proton is	A. 1.67 x 10^-27kg B. 1.67 x 10^-31kg C. 1.66 x 10^-34kg D. 1.67 x 10^-17kg