PUMPA - SMART LEARNING
எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்
Book Free Demo1. Write any three features of natural and artificial radioactivity.
Natural radioactivity | Artificial radioactivity |
Emission of radiation due to the of a nucleus. | Emission of radiation due to the disintegration of a nucleus through the process. |
| radiation is emitted. | Elementary particle like is emitted. |
| It is a process. | It is an process. |
2. Define critical mass.
The of a fissile material required to is called 'critical mass (\(m_c\))'. It depends on the of the fissile material.
If the mass of the fissile material is the critical mass, it is termed as 'subcritical'. If the mass of the fissile material is the critical mass, it is termed as 'supercritical'.
3. Define one roentgen.
One roentgen (\(R\)) is the quantity of radioactive substance which produces a charge of \(coulomb\) in \(1\ kg\) of air under standard conditions of pressure, temperature and humidity. Roentgen measures the radiation exposure of and .
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