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Question 591
Biophysics → General
Classification
Question
SSBAQuestion Header
A radioactive sample undergoes 600 transformations each second. What is its activity in SI units?
Question Stem
Select the single best answer.
Options
A
600 Bq
B
600 Ci
C
3.7 × 10^10 Bq
D
600 half-lives
E
0.5 Bq
Explanation
The becquerel is the SI unit of radioactivity. One becquerel represents one radioactive transformation per second; therefore 600 transformations per second correspond to 600 Bq.
Option Validity
B) A curie is equivalent to 3.7 × 10^10 transformations per second.
C) 3.7 × 10^10 transformations per second corresponds to 1 Ci, not 600 transformations per second.
D) Half-life measures the time required for half of the initial radioactive material to transform.
E) 600 transformations per second equals 600 Bq.
Further Reading
Saxena R. Textbook for MRCOG-1. Chapter 9: Biophysics, pp.278–279.