Home
Class 12
PHYSICS
Two radioactive substances X and Y origi...

Two radioactive substances X and Y originally have `N_(1)` and `N_(2)` nuclei respectively.Half life of X is half of the half life of Y .After three half lives of Y ,number of nuclei of both are equal.The ratio `(N_(1))/(N_(2))` will be equal to :

(1) `(1)/(8)`

(2) `(3)/(1)`

(3) `(8)/(1)`

(4) `(1)/(3)`

Promotional Banner

Similar Questions

Explore conceptually related problems

Two radioactive substance X and Y initially contain equal number of nuclei. X has a half life of 1 hour and Y has a half-life of 2 hours. After 2 hours the ratio of activity of X to that of y is

Half-life of a radioactive substance A is two times the half-life of another radioactive substance B . Initially, the number of A and B are N_(A) and N_(B) , respectively . After three half-lives of A , number of nuclei of both are equal. Then, the ratio N_(A)//N_(B) is .

There are two radioactive substance A and B . Decay consant of B is two times that of A . Initially, both have equal number of nuceli. After n half-lives of A ,rates of disintegaration of both are equal. The value of n is .

Two radioactive substances X and Y initially contain equal number of atoms. Their half-lives are 1 hour and 2 hours respectively. Calculate the ratio of their rates of disintegration after four hours.

Two radioactive substances have half-lives T and 2T. Initially, they have equal number of nuclei. After time t=4T , the ratio of their number of nuclei is x and the ratio of their activity is y. Then,

Two radioactive substances X and Y initially contain an equal number of atoms. Their half-lives are 1 hour and 2 hours respectively. Then the ratio of their rates of disintergration after two hours is

The half life of 2g sample of radioactive nuclide 'X' is 15 min. The half life time of 1g sample of X is

The half lives of radioactive elements X and Y are 3 mintue and 27 minute respectively. If the activities of both are same, then calculate the ratio of number of atoms of X and Y.

Two radioactive samples of different elements (half-lives t_1 and t_2 respectively) have same number of nuclei at t=0 . The time after which their activities are same is

The number of nuclei of two radioactive substance is the same and their half-lives are 1 year and 2 years respectively. The ratio of their activities after 6 years will be