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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
- The acceleration due to gravity at a place is π² m/sec². Then the time period
- A common emitter amplifier is designed with n-p-n transistor (α=0.99).
- Which of the following combinations should be selected for better tuning of an L-C-R
- A car sounding a horn of frequency 100 Hz passes an observer. The ratio
- The potential energy of a weightless spring compressed by a distance D is proportional
Topics: Radioactivity (83)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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