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	For an atom having atomic number Z and atomic weight A, the charge on the nucleus is	A. A - Z B. A + Z C. Z D. A
2	After alpha decay the atomic number of the atom	A. increase by four B. decreases by two C. increases by two D. decrease by four
3	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
4	Nucleus consists of	A. proton and neutron B. protons and electron C. electron and neutron D. protons only
5	Alfa , beta and gamma rays are emitted from a radio-active substance	A. spontaneously B. when it is heated C. when it is exposed to light D. When it interacts with the other particle
6	An alpha particle has a charge of	A. +2e B. -2e C. -e D. +3e
7	The unit of decay constant is	A. sex B. sec² C. sec^-1 D. sec^-2
8	Neutrons are	A. positive charge B. negatively charged C. massless D. neutral
9	Radiation detector are used to	A. measure intensity of radiation B. measure energy of radiation C. difference between different types of radiation D. all the above
10	Which of the following material has longer half life	A. radium B. polonium C. radium D. uranium