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	Hydrogen atom with only one proton and one neutron in its nucleus, and one electron, is called	A. deuterium B. protium C. tritium D. none of these
2	Fraction of the decaying atoms per unit time is called	A. decay atom B. decay element C. decay constant D. decay
3	The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains	A. 3 more neutrons B. 3 more electrons C. 3 more protons D. 3 more ions
4	The nucleus/nuclei of hydrogen is/are:	A. Proton B. Deuteron C. Triton D. All of these
5	When radioactive nucleus emits aβ-particle, the proton-neutron ratio	A. decrease B. increase C. same D. none of these
6	Beta particles are	A. hydrogen nuclei B. helium nuclei C. electrons D. photons
7	A mass difference of 0.0012 u is equivalent to and energy of:	A. 0.5 Me V B. 1.13 MeV C. 5.13 MeV D. 1.13 keV
8	Rate of decay is actually described by.	A. Half line B. Decay constant C. Mean life D. Total life
9	The counter, which also provides the power to the G.M. tube is called:	A. Thin mica window B. thin glass window C. Airy window D. Wooden window
10	The number if neutrons in the nucleus of ₉₂U²³⁵are	A. Infinite B. 92 C. 235 D. 143