Igcse Model Questions Vol1 2023 Physics Question 33

Practice objective / multiple choice question 33 from the 2023 Igcse Model Questions Vol1 Physics examination.

Igcse Model Questions Vol1 2023 Physics Objective / Multiple Choice Hard Difficulty
Question 33 IGCSE_MODEL_QUESTIONS_VOL1 • 2023 • PHYSICS • objective

A sample of a radioactive isotope has an initial activity of \(5.0\times10^{9}\ \text{Bq}\). After \(12\) days its activity has decreased to \(1.25\times10^{9}\ \text{Bq}\). (a) Determine the half‑life of the isotope in days. (b) Each decay releases \(2.0\ \text{MeV}\) of energy. Assuming the activity follows exponential decay, calculate the total energy released during the 12‑day period in kilojoules.

Answer Options

A. Half‑life ≈ 6.0 days, total energy ≈ 1.5 kJ
Correct Answer B. Half‑life ≈ 6.0 days, total energy ≈ 0.90 kJ
C. Half‑life ≈ 8.2 days, total energy ≈ 1.2 kJ
D. Half‑life ≈ 4.5 days, total energy ≈ 0.45 kJ
Correct Answer
B
Correct Option:
Half‑life ≈ 6.0 days, total energy ≈ 0.90 kJ

About This Question

This is Igcse Model Questions Vol1 2023 Physics Question 33. It is one of the objective questions from the 2023 Igcse Model Questions Vol1 Physics examination.

Difficulty level: Hard .

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