Igcse Model Questions Vol1 2020 Physics Question 39

Practice objective / multiple choice question 39 from the 2020 Igcse Model Questions Vol1 Physics examination.

Igcse Model Questions Vol1 2020 Physics Objective / Multiple Choice Hard Difficulty
Question 39 IGCSE_MODEL_QUESTIONS_VOL1 • 2020 • PHYSICS • objective

A 2.0 g sample of a radioactive isotope X (atomic mass 240 g mol\(^{-1}\)) decays by alpha emission, releasing \(5.0\ \text{MeV}\) of energy per decay. The half‑life of X is 5 years.\n(a) Calculate the initial activity of the sample in becquerels.\n(b) Determine the total energy released during the first 20 years.\n(c) Find the average power output of the sample over this 20‑year period.

Answer Options

Correct Answer A. (a) 2.2×10¹³ Bq, (b) 3.8×10⁹ J, (c) 6.0 W
B. (a) 1.1×10¹³ Bq, (b) 2.0×10⁹ J, (c) 3.2 W
C. (a) 4.4×10¹³ Bq, (b) 7.6×10⁹ J, (c) 12.0 W
D. (a) 3.3×10¹³ Bq, (b) 5.0×10⁹ J, (c) 8.0 W
Correct Answer
A
Correct Option:
(a) 2.2×10¹³ Bq, (b) 3.8×10⁹ J, (c) 6.0 W

About This Question

This is Igcse Model Questions Vol1 2020 Physics Question 39. It is one of the objective questions from the 2020 Igcse Model Questions Vol1 Physics examination.

Difficulty level: Hard .

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