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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 uniform circular motion, work done in one complete rotation is
- Two capacitors 3μF and 4μF, are individually charged across a 6 V battery.
- An electric motor runs on DC source of emf 200 V and draws a current of 10 A.
- In a series resonant LCR circuit, the voltage across R is 100 volts and R =1kΩ
- A high altitude, a body explodes at rest into two equal fragments with one fragment
Topics: Radioactivity (83)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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