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A radioactive substance decays to 1/16th of its initial activity in 40 days. The half-life of the radioactive substance expressed in days is
Options
(a) 2.5
(b) 5
(c) 10
(d) 20
Correct Answer:
10
Explanation:
N/N₀ = (1/2)ⁿ
(1/16) = (1/2)ⁿ
n = 4
Half life = t / n = 40 / 4 = 10 day
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Topics: Radioactivity
(83)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A thermocouple is made from two metals, antimony and bismuth. If one junction
- The first line in Lyman series has wavelength λ. The wavelength
- Under the action of a force F=cx, the position of a body changes from 0 to x.The work done
- A parallel beam of fast moving electrons is incident normally on a narrow slit.
- 34 gram of water at 30⁰C is poured into a calorimeter at 15⁰C.
Topics: Radioactivity (83)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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