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NEET2005PhysicsNuclear PhysicsActual

A radioactive material has a half-life of 10 days. What fraction of the material would remain after 30 days?

Options

  1. A0.5
  2. B0.25
  3. C0.125
  4. D0.33

Correct answer

C. 0.125

Step-by-step solution

T_ 1 / 2 =10 days, T=30 days aligned & T=n T_ 1 / 2 . n= T T_ 1 / 2 = 30 10 =3 & N N₀ = ( 1 2 )^n= ( 1 2 )^3= 1 8 =0.125 . aligned

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