Which of the following radiations is the least penetrating ?
Which of the following radiations is the least penetrating ?
A. α-rays
B. β-rays
C. γ-rays
D. X-rays
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Which is not a fissile nuclear material ?
Which is not a fissile nuclear material ?A. U-233
B. U-235
C. U-238
D. Pu-239Research reactors are normally meant for_____________________?
Research reactors are normally meant for_____________________?A. Producing high neutron flux 1012-1013 neutrons/cm2, sec and studying the effect of neutron
bombardment on different materials
B. Accelerating the neutrons
C. Power generation
D. None of theseThe atomic number of a radioactive element is not changed, when it emits _____________ rays?
The atomic number of a radioactive element is not changed, when it emits _____________ rays?A. α
B. β
C. γ
D. α & βIsotopes of an element have the same__________________?
Isotopes of an element have the same__________________?A. Number of neutrons
B. Mass number
C. Electronic configuration
D. Atomic weightThe sum of masses of two nuclei produced in nuclear fission compared to the mass of original nucleus is_____________________?
The sum of masses of two nuclei produced in nuclear fission compared to the mass of original nucleus is_____________________?A. Less
B. More
C. Same
D. Much moreThe size of an atom is of the order of one __________________?
The size of an atom is of the order of one __________________?A. °Angstrom
B. Fermi
C. Micron
D. mm