There are n number of radioactive nuclei in a sample that undergoes beta decay. If from the sample, `n'` number of `beta`-particels are emitted every `2s`, then half-life of nuclei is .

The fraction of the initial number of radioactive nuclei which remain undercayed after half of a half-life of the radioactive sample is

In beta -decay, the nuclei emit

Three fourthers of the active nuclei present in a redioactive sample decay in 3/4s. The half life of the sample is

Three fourths of the active nuclei present in a radioactive sample decay in 3//4s . The half life of the sample is

The fraction of the initial number of radioactive nuclei which remain undecayed after half of a half-life of the radioactive sample is

If N_(0) is the number of radioactive nuclei initially present , then the number of nuclei remaining undecayed at the end of nth half life is

State the law of radioactive decay, If N_0 is the number of radioactive nuclei in the sample at same initial time, find out the relation to determine the number N present at a subsequent time. Draw a plot of N as a function of time.