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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 wheel has angular acceleration of 3.0 rad/sec² and an initial angular speed
- The volume of a nucleus is directly proportional to
- A U²³⁵ reactor generates power at a rate of P producing 2×10⁸ fission per second.
- A leaf which contains only green pigments is illuminated by a laser light
- Imagine a light planet revolving around a very massive star in a circular
Topics: Radioactivity (83)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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