JAMB Physics 2011 Objective — Question 40
Question 40 of 49 from the Joint Admissions and Matriculation Board (JAMB) Physics 2011 Objective paper, with the correct answer and a full explanation.
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A radioactive isotope has a decay constant of 10⁻⁵s⁻¹. Calculate its half life.
- A. A. 6.93 x 10⁴sCorrect
- B. B. 6.93 x 10⁻⁴s
- C. C. 6.93 x 10⁻³s
- D. D. 6.93 x 10⁵s
Explanation
T½ = 0.693/λ = 0.693/10⁻⁵ = 6.93x10⁴s.
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