$(a)\;1/12 X\qquad(b)\;1/11X\qquad(c)\;1/32X\qquad(d)\;1/224X$

Want to ask us a question? Click here

Browse Questions

Ad |

0 votes

0 votes

Answer : (b) $\;\large\frac{1}{11X}$

Explanation :

$\large\frac{N_{A}}{N_{B}}=\large\frac{1}{e}\;$ or

$\large\frac{N_{0} e^{-12Xt}}{N_{0} e^{-Xt}}=\large\frac{1}{e}$

Initially both have same no . of nuclei say no .

or $\;e=\large\frac{e^{-Xt}}{e^{-12Xt}}$$=e^{11Xt}$

$11Xt=1$

$t=\large\frac{1}{11X}\;.$

Ask Question

Take Test

x

JEE MAIN, CBSE, AIPMT Mobile and Tablet App

The ultimate mobile app to help you crack your examinations

...