A radioactive substance does not emit________________?
A radioactive substance does not emit________________?
A. α-ray
B. Proton
C. Position
D. β-ray
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Absorption/scattering cross-section of an element is expressed in “barn”, which is equivalent to___________________?
Absorption/scattering cross-section of an element is expressed in “barn”, which is equivalent to___________________?A. 10-24 cm2
B. 10-12 cm
C. 1 Angstrom
D. 10-24 cmThe decrease in the atomic number is not observed in case of________________?
The decrease in the atomic number is not observed in case of________________?A. Electron capture
B. β-emission
C. α-emission
D. Positron emissionUse of molten metal as a coolant in fast breeder reactor helps in_________________?
Use of molten metal as a coolant in fast breeder reactor helps in_________________?A. Rapid heat transfer from the core
B. Accelerating the reaction rate in the core
C. Breeding neutrons
D. Accelerating the neutronsEmission of β-particles during radioactive decay of a substance is from__________________?
Emission of β-particles during radioactive decay of a substance is from__________________?A. Innermost shell
B. Nucleus
C. Outermost shell
D. None of theseA fertile material is the one, which can be__________________?
A fertile material is the one, which can be__________________?A. Converted into fissile material on absorption of neutron
B. Fissioned by slow (thermal) neutrons
C. Fissioned by fast neutrons
D. Fissioned by either slow or fast neutronsWhich of the following is artificially produced as it does not occur in nature ?
Which of the following is artificially produced as it does not occur in nature ?A. Uranium-235
B. Uranium-233
C. Plutonium-239
D. Both B. and C.