A radioactive sample at any instant has its disintegration rate … disintegrations per minute. After … minutes, the rate is … disintegrations per minute. Then, the decay constant (per minute) is

Atoms and Nuclei

JEE Main 2003 · Annual, Paper 1 · Q6071

PhysicsEasy183×since 2002Q6071

A radioactive sample at any instant has its disintegration rate

5000

disintegrations per minute. After

5

minutes, the rate is

1250

disintegrations per minute. Then, the decay constant (per minute) is