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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
- Masses of 3 wires of same metal are in the ratio 1:2:3 and their lengths
- A ball is dropped from a height of 20 cm. Ball rebounds to a height of 10cm
- Which is incorrect about thermal process
- A cockroach is moving with a velocity v in anticlockwise direction on the rim
- The total energy of an electron in the first excited state of hydrogen atom
Topics: Radioactivity (83)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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