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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
- What should be the velocity(v) of a sound source moving towards a stationary observer
- What is the amount of energy released by deuterium and tritium fusion?
- In some region, gravitational field is zero. The gravitational potential
- The electric potential V at any point (x,y,z) all in meters in space is given by
- A mass of 2.0 kg is put on a flat plan attached to a vertical spring fixed on the ground
Topics: Radioactivity (83)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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