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	The penetration power ofβ-particle is	A. zero B. less thanα-particle C. equal toα-particle D. greater thanα-particle
2	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
3	Curie is a unit of	A. reluctance B. resistivity C. binding energy D. radioactivity
4	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
5	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
6	The figure 1.007276μ shows the mass of an:	A. Atom B. Positron C. Electron D. Neutron
7	U-238 present in the natural uranium is about:	A. 59% B. 0.007% C. 99% D. 39%
8	When a nucleus emits an alpha particle, it atomic mass decreased by	A. 2 B. 1 C. 4 D. 3
9	An alpha particle has a charge of	A. +2e B. -2e C. -e D. +3e
10	The number of isotopes of hydrogen are	A. 2 B. 1 C. 3 D. 4