The unit of radio-activity is

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ISRO URSC Technical Assistant Mechanical 24 March 2019 Official Paper
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  1. electron-volt
  2. curie
  3. electron-ampere
  4. MeV

Answer (Detailed Solution Below)

Option 2 : curie
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Explanation:

Radioactivity:

  • Radioactivity refers to the particles which are emitted from nuclei as a result of nuclear instability.
  • This was discovered by Henri becquerel in 1896.
  • It emits radioactive elements viz- alpha, beta, gamma rays.
  • A curie is a non-SI unit of radioactivity.
  • The System International of units (SI system) uses the unit of becquerel (Bq) as its unit of radioactivity. 
  • One curie is equal to 37 billion Bq.
  • 37 billion Bq = 1 curie
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