The activity of a radioactive sample is defined as the number of decays per second.For a sample with N particles and a decay constant $\lambda$,the activity is
A)proportional to $\lambda$ and inversely proportional to N.
B)proportional to $\lambda$ but independent of N.
C)directly proportional to both $\lambda$ and N.
D)independent of $\lambda$ but proportional to N.
E)inversely proportional to both $\lambda$ and N.

Question

Quizplus · Accepted Answer

The activity of a radioactive sample is directly proportional to the decay constant ($\lambda$) and the number of particles (N) in the sample. This is described by the equation Activity = $\lambda N$, where $\lambda$ is the decay constant and N is the number of particles.

The Activity of a Radioactive Sample Is Defined as the Number