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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
Related Questions: - The range of voltmeter is 10V and its internal resistance is 50Ω.
- A stone tied to the end of a string of 1 m long is whirled in a horizontal circle
- A cricket ball of mass 250 g collides with a bat with velocity 10 m/s
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Topics: Radioactivity
(83)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The range of voltmeter is 10V and its internal resistance is 50Ω.
- A stone tied to the end of a string of 1 m long is whirled in a horizontal circle
- A cricket ball of mass 250 g collides with a bat with velocity 10 m/s
- Which of the following will be σ if Y=2.4 η?
- If h is the height of the capillary rise and r be the radius of capillary tube,
Topics: Radioactivity (83)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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