Questions
A radioactive nucleus A with a half life T decays into a nucleus B. At t=0 , there is no nucleus of B. At some time t , the ratio of the number of nuclei of B to that of A is 0.3 then, t is given by
detailed solution
Correct option is C
Number of Nuclei of B = Number of decayed nuclei of ANB=No−Noe−λt Number of nuclei of A is NA=Noe−λt⇒NBNA=N0−N0e−λtN0⋅e−λt⇒0.3=eλt−1⇒eλt=1.3⇒λt=ln1.3⇒t=1λln1.3⇒t=Tln2ln1.3Talk to our academic expert!
Similar Questions
In a radioactive material, fraction of active material remaining after time t is 9/16. The fraction that was remaining after t/2 is :
799 666 8865
support@infinitylearn.com
6th Floor, NCC Building, Durgamma Cheruvu Road, Vittal Rao Nagar, HITEC City, Hyderabad, Telangana 500081.
free study material
JEE Mock Tests
JEE study guide
JEE Revision Notes
JEE Important Questions
JEE Sample Papers
JEE Previous Year's Papers
NEET previous year’s papers
NEET important questions
NEET sample papers
NEET revision notes
NEET study guide
NEET mock tests
