Post Utme Unilorin 2022 Physics Question 9

Practice objective / multiple choice question 9 from the 2022 Post Utme Unilorin Physics examination.

Post Utme Unilorin 2022 Physics Objective / Multiple Choice
Question 9 POST_UTME_UNILORIN • 2022 • PHYSICS • objective

A radioactive sample of half-life $T_{1/2}$ decays to a stable nucleus. If the initial activity is $A_0$ and the decay cons\tant is $\lambda$, what is the activity of the sample after time $t$?

Answer Options

Correct Answer A. A(t) = A_0 e^{-\lambda t}
B. A(t) = A_0 e^{\lambda t}
C. A(t) = A_0 \left\( 1 - \frac{\lambda t}{T_{1/2}} \right \)
D. A(t) = A_0 \left\( 1 + \frac{\lambda t}{T_{1/2}} \right \)
Correct Answer
A
Correct Option:
A(t) = A_0 e^{-\lambda t}

About This Question

This is Post Utme Unilorin 2022 Physics Question 9. It is one of the objective questions from the 2022 Post Utme Unilorin Physics examination.

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