Related Questions

A moderator, apart from its high neutron slowing power, and low non-productive neutron, should be
A Stable under nuclear radiation
B Corrosion resistant
C Good thermal conductor
D All of these
What is the size of Electron as comapared to Proton and Neutron?
A 1/355
B 1/1236
C 1/1836
D 1/1923
The energy required to be applied to a radioactive nucleus for the emission of a neutron is
A 1 MeV
B 2.4 MeV
C 4.3 MeV
D 7.8 MeV
Energy to be supplied to the radioactive nucleus for the emission of a neutron is __________ MeV.
A 0.8
B 7.8
C 200
D 10000
240 radioactive grams of goo loses half its radioactivity every 10 days. How many grams of radioactive goo is left in 40 days?
A 120
B 60
C 15
D none
The half life period of a radioactive substance is best determined by counting the number of alpha particles emitted per second in a Geiger Muller counter from its known quantity. If the half life period of a radioactive substance is one month, then
A $${\frac{3}{4}^{{\text{th}}}}$$ of it will disintegrate in two months
B It will completely disintegrate in two months
C It will completely disintegrate in four months
D $${\frac{l}{8}^{{\text{th}}}}$$ of it will remain intact at the end of four months
The ratio of mass of proton to that of electron is nearly
A 1840
B 1480
C 30
D 4
Which radioactive pollutant has recently drawn to public, due to its occurrence in the building material?
A Thorium
B Radium
C Plutonium
D Radan
Thoria is an expensive refractory material and is radioactive in nature. Thorium oxide is used in the manufacture of
A Segar cones
B Muffles for muffle furnaces
C Insulating bricks
D Crucibles used for melting of high purity metals
Beta rays emitted by a radioactive material are
A The electrons orbiting around the nucleus
B Charged particles emitted by nucleus
C Neutral particles
D Electromagnetic radiations

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