| ⇦ | 
| ⇨ |
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 photosensitive metallic surface has work function, hν₀. If photons of energy
- The rest mass of a body is m1. It moves with a velocity of 0.6c, then its relativistic
- When a spring is extended by 2 cm energy stored is 100 J. When extended further by 2 cm
- Current flows in semi-conductors through
- Zenor breakdown will occur if
Topics: Radioactivity
(83)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A photosensitive metallic surface has work function, hν₀. If photons of energy
- The rest mass of a body is m1. It moves with a velocity of 0.6c, then its relativistic
- When a spring is extended by 2 cm energy stored is 100 J. When extended further by 2 cm
- Current flows in semi-conductors through
- Zenor breakdown will occur if
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