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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
- IF A⃗ and B⃗ are two vectors and θ is the angle between them
- A conducting sphere of radius R is given a charge Q. The electric potential
- A galvanometer has a resistance 50Ω. A resistance of 5Ω is connected parallel to it.
- An avarage induced e.m.f. of 1 V appears in a coil when the current in it is changed
- An electron moving in a circular orbit of radius r makes n rotations per second.
Topics: Radioactivity (83)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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