The half life of a radioactive element is T and its initial activity at `t=0` is `A_(0)` and at `t=t` it is A, then

The half-life of a radioactive sample is T . If the activities of the sample at time t_(1) and t_(2) (t_(1) lt t_(2)) and R_(1) and R_(2) respectively, then the number of atoms disintergrated in time t_(2)-t_(1) is proportional to

The half-life of a radioactive sample is T . If the activities of the sample at time t_(1) and t_(2) (t_(1) lt t_(2)) and R_(1) and R_(2) respectively, then the number of atoms disintergrated in time t_(2)-t_(1) is proportional to

Half-life of a radioactive element is T_(1//2) and its average life is tau . Write down the relation between them.

Half-life of a radioactive substance is T. At time t_1 activity of a radioactive substance is R_1 and at time t_2 it is R_2 . Find the number of nuclei decayed in this interval of time.

Half-life of a radioactive substance is T. At time t_1 activity of a radioactive substance is R_1 and at time t_2 it is R_2 . Find the number of nuclei decayed in this interval of time.

The t_(0.5) of a radioactive element is related to its average life by the expression

The t_(0.5) of a radioactive element is related to its average life by the expression

The rate of decay of a radioactive element at t=0 instant 10^(3) disintegrations per second. If the half life of the elements is Is, then the rate of decay after Is will be

The half life of a radioactive substance is T_(0) . At t=0 ,the number of active nuclei are N_(0) . Select the correct alternative.