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JIPMER2014PhysicsNuclear Physics

Remaining quantity (in %) of radioactive element after 5 half lives is

Options

  1. A4.125 %
  2. B3.125 %
  3. C31.1 %
  4. D42.125 %

Correct answer

B. 3.125 %

Step-by-step solution

Remaining quantity N=N₀ ( 1 2 )^n=N₀ ( 1 2 )^5= N₀ 32 In percentage, N= N₀ 30 N₀ 100=3.125 %

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