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 nuclei of an element having the same charge number but different mass numbers are called:	A. Isobars B. Isotopes C. Isomers D. Isobaric
2	β-particles are easily deflected by collisions than heavy	A. α-particles B. β-particles C. γ-particles D. none of these
3	How many isotopes of helium are present?	A. 1 B. 2 C. 3 D. 4
4	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
5	How much time, theα-particle more massive than an electron	A. 600 B. 7000 C. 5000 D. 15000
6	A pair of quark and antiquark makes a:	A. Meson B. Baryon C. Proton D. Neutron
7	The unit of decay constant is:	A. Second B. Metre C. Hour D. Year
8	If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be	A. Equal to 1 B. Less than 1 C. Greater than 1 D. Infinity
9	The time required for a radioactive material to decrease in active by one half is called	A. half time B. half life C. disintegration time D. mean life
10	When certain nucleus emits aβ-particles, is mass number:	A. Remain same B. Increases by one C. Decreases by one D. Decreases by four