Physics-
General
Easy

Question

In Fig. X represents time and Y represent activity of a radioactive sample. Then the activity of sample, varies with time according to the curve

  1. A    
  2. B    
  3. C    
  4. D    

The correct answer is: B


    Activity equals negative fraction numerator d N over denominator d t end fraction equals lambda N equals lambda   N subscript 0 end subscript e to the power of negative lambda t end exponent
    i.e., graph between activity and t, be exponential having negative slope

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