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JEE Advanced 2006
Exam
JEE Advanced
Year
2006
Subject
Physics
Chapter
Nuclear Physics

JEE Advanced 2006 · Physics · Nuclear Physics

Half-life of a radio active substance ' A ' is 4 days. The...

Half-life of a radio active substance ' AA ' is 4 days. The probability that a nucleus will decay in two half-lives is

Options

  1. A14\frac{1}{4}
  2. B34\frac{3}{4}
  3. C12\frac{1}{2}
  4. D1

Correct answer

B. 34\frac{3}{4}

Step-by-step solution

After two half lives 14\frac{1}{4} th fraction of nuclei will remain undecayed. Or, 34\frac{3}{4} th fraction will decay. Hence, the probability that a nucleus decays in two half lives is 34\frac{3}{4}.
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