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A sample of radioactive element has a mass of 10 gram at an instant t=0. The approximate mass of this element in the sample after two mean lives is
Options
(a) 2.50 gram
(b) 3.70 gram
(c) 6.30 gram
(d) 1.35 gram
Correct Answer:
1.35 gram
Explanation:
M = M₀ e-λt
Since, t = 2/λ, we get
M = 10 × e-λ × (2/λ) = 10 e⁻² = 1.35 gram
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Topics: Radioactivity
(83)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A charged particle of mass m and charge q moves along a circular path of radius
- A 50Hz AC signal is applied in a circuit of inductance of (1/π)H and resistance 2100Ω
- The total radiant energy per unit area, normal to the direction of incidence
- Three resistances 2Ω, 3Ω and 4Ω are connected in parallel. The ratio of currents passing
- The following four wires are made of the same material. Which of these will have
Topics: Radioactivity (83)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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