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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 common emitter amplifier is designed with n-p-n transistor (α=0.99).
- The radius of a planet is twice the radius of earth. Both have almost
- The wave function (in SI unit) for a light wave is given as Ψ(x,t)= 10³ sin π
- Before using the tangent galvanometer, its coil is set in
- Hard X-rays for the study of fractures in bones should have a minimum wavelength
Topics: Radioactivity (83)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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