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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: - A car is moving in a circular horizontal track of radius 10.0 m with a constant speed
- A force of 10N is applied on a body for 3 sec and the corresponding displacement 6 m.
- The device can act as a complete electronic circuit is
- An object is projected with a velocity of 20 m/s making an angle of 45⁰ with horizontal.
- In N-type semi-conductor current is due to
Topics: Radioactivity
(83)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A car is moving in a circular horizontal track of radius 10.0 m with a constant speed
- A force of 10N is applied on a body for 3 sec and the corresponding displacement 6 m.
- The device can act as a complete electronic circuit is
- An object is projected with a velocity of 20 m/s making an angle of 45⁰ with horizontal.
- In N-type semi-conductor current is due to
Topics: Radioactivity (83)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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