NEET Physics Nuclei Questions Solved

NEET - 2010

The decay constant of a radio isotope is λ. If A1 and A2 are its activities at times t1 and t2 respectively, the number of nuclei which have decayed during the time (t1-t2)

(a) A1t1-A2t2                                       (b) A1-A2

(c) (A1-A2)λ                                         (d) λ(A1-A2) 

          A1=λN1          A2=λN2  N1-N2=A1-A2λ

Difficulty Level:

  • 12%
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  • 49%
  • 22%
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