| ⇦ | 
| ⇨ |
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 radioactive substance contains 10000 nuclei and its halflife period is 20 days
- Nickel shows ferromagnetic property at room temperature. If the temperature is
- Two radioactive materials X₁ and X₂ have decay constants 5λ and λ respectively
- A body of mass 0.5 kg travels in a straight line with velocity v=a x³/², where
- Wires A and B are made from the same material. A has twice the diameter and three times
Topics: Radioactivity
(83)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A radioactive substance contains 10000 nuclei and its halflife period is 20 days
- Nickel shows ferromagnetic property at room temperature. If the temperature is
- Two radioactive materials X₁ and X₂ have decay constants 5λ and λ respectively
- A body of mass 0.5 kg travels in a straight line with velocity v=a x³/², where
- Wires A and B are made from the same material. A has twice the diameter and three times
Topics: Radioactivity (83)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply