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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
- In a compound microscope, the focal length of the objective is 2.5 cm and of eye lens
- The angle of incidence at which reflected light is totally polarised for refraction
- An ideal gas expands in such a manner that its pressure and volume can be related
- If a given volume of water in a 220V heater is boiled in 5 min, then same volume
- Weber/m² is equal to
Topics: Radioactivity (83)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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