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प्रश्न
Define one roentgen.
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उत्तर
One roentgen is defined as the quantity of radioactive substance which produces a charge of 2.58 × 10-4 coulomb in 1 kg of air under standard conditions of pressure, temperature, and humidity.
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संबंधित प्रश्न
Write the uses of Radioactive substances.
Where in the industrial field is radioactivity used?
Which of the following is the radio isotope in pair?
\[\ce {^30_15 P , ^32_15 P}\]
Give reason for your answer.
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\[\ce {^39_19 K , ^40_19 K}\]
Give reason for your answer.
State the medical use of radioactivity.
Which radioactive material is present in the ore of pitchblende?
Write any two elements which are used for inducing radioactivity?
Which hazardous radiation is the cause for genetic disease?
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