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The radioactivity of a certain material drops to 1/16 of the initial value in 2 hours. The half-life of this radio nuclide is
Options
(a) 10 min
(b) 20 min
(c) 30 min
(d) 40 min
Correct Answer:
30 min
Explanation:
In 4 × T₁/₂, N = (N₀ / 2) × (1 / 2) × (1 / 2) × (1 / 2)
= N₀ / 16 4 × T₁/₂ = 2 hrs.
⇒ T₁/₂ = 30 min
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Topics: Radioactivity
(83)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Three objects coloured black, gray and white can withstand hostile conditions upto 2800⁰C.
- A nucleus ᵐₙ X emits one α- particle and two β- particles. The resulting nucleus is
- One coolie takes 1 minute to raise a suitcase through a height of 2 m
- A black body at 227⁰C radiates heat at the rate of 7cals/cm²s. At a temperature
- A conductor of length 5 cm is moved parallel to itself with a speed of 2 m/s,
Topics: Radioactivity (83)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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