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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
- An object is 8 cm high. It is desired to form a real image 4 cm high at 60 cm from
- An α-particle and a proton travel with the same velocity in a magnetic field
- If light emitted from sodium bulb is passed through sodium vapour,
- When an α-particle of mass m moving with velocity ν bombards on a heavy nucleus
- When an object is placed 40cm from a diverging lens, its virtual image is formed 20 cm
Topics: Radioactivity (83)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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