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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 the highest modulating frequency of the wave is 5 kHz, the number
- An electric motor runs on DC source of emf 200 V and draws a current of 10 A.
- A particle moves a distance x in time but according to equation x=(t+5)⁻¹
- The horizontal range and maximum height attained by a projectile are R and H,respectively
- A thin equiconvex lens of refractive index 3/2 and radius of curvature 30 cm
Topics: Radioactivity (83)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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