| ⇦ | 
| ⇨ |
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: - Carbon,silicon and germanium have four valence electrons each. At room temperature
- Which component of electromagnetic spectrum have maximum wavelength?
- A 100Ω resistance and a capacitor of 100Ω reactance are connected in series
- Ring, hollow ring and solid sphere are rolled down from inclined plane
- A circular disc X of radius R is made from an iron plate of thickness t and another disc
Topics: Radioactivity
(83)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Carbon,silicon and germanium have four valence electrons each. At room temperature
- Which component of electromagnetic spectrum have maximum wavelength?
- A 100Ω resistance and a capacitor of 100Ω reactance are connected in series
- Ring, hollow ring and solid sphere are rolled down from inclined plane
- A circular disc X of radius R is made from an iron plate of thickness t and another disc
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