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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
- An electric kettle takes 4A current at 220 V. How much time will it take to boil 1 kg
- A Carnot engine takes heat from a reservoir at 627⁰C and rejects heat
- The molar specific heats of an ideal gas at constant pressure and volume are denoted
- The magnifying power of a telescope is 9. When it is adjusted for parallel rays
- A n-p-n transistor is connected in common emitter configuration in a given amplifier.
Topics: Radioactivity (83)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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