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NEET2012PhysicsNuclear PhysicsActual

Half life of a radio-active element is 8 years, how much amount will be present after 32 years?

Options

  1. A1 4
  2. B1 8
  3. C1 16
  4. D1 32

Correct answer

C. 1 16

Step-by-step solution

Here, T_ 1 / 2 =8 years t=32 years Using, N=N₀ ( 1 2 )^ t T_ 1 / 2 ( ₀ ₀ )= ( 1 2 )^ 32 8 = ( 1 2 )^4 ( ₀ )= 1 16

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