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Atoms and Nuclei question

2008 · Shift 2 · Q47
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Atoms and Nuclei question

2008 · Shift 2 · Q47

JEE AdvancedPhysicsAtoms and NucleiMCQ+3 / −1
A radioactive sample S1 having activity of 5 μ\muμ Ci has twice the number of nuclei as another sample S2 which has an activity of 10 μ\muμ Ci. The half lives of S1 and S2 can be :
  1. A
    20 years and 5 years, respectively
  2. B
    20 years and 10 years, respectively
  3. C
    10 years each
  4. D
    5 years each
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