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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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¹H+⁷Li→⁴He+⁴He
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Topics: Radioactivity
(83)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A gramophone record is revolving with an angular velocity ?. A coin is placed at
- Water drops fall from a top on the floor 5 m below at regular intervals
- Assuming the sun to have a spherical outer surface of radius r
- What is the Q-value of the reaction? ¹H+⁷Li→⁴He+⁴He
- The r.m.s speed of the molecules of a gas in a vessel is 400 m/s
Topics: Radioactivity (83)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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