Percentage of heavy water in ordinary water is around__________________?
Percentage of heavy water in ordinary water is around__________________?
A. 0.015
B. 7.54
C. 0.71
D. 32.97
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Which of the following may not need a moderator ?
Which of the following may not need a moderator ?A. Candu reactor
B. Fast breeder reactor
C. Homogeneous reactor
D. Pressurised water reactorThe new nucleus formed after β-decay of a radioactive element has___________________?
The new nucleus formed after β-decay of a radioactive element has___________________?A. Less atomic number
B. Less atomic weight
C. More atomic number
D. More atomic weightA 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 neutronsA radioactive substance does not emit________________?
A radioactive substance does not emit________________?A. α-ray
B. Proton
C. Position
D. β-rayA radioactive isotope undergoes decay with respect to time following _____________ law?
A radioactive isotope undergoes decay with respect to time following _____________ law?A. Logarithmic
B. Exponential
C. Linear
D. Inverse squareAbsorption/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 cm