MENU

A sample of radioactive element has a mass of 10 gram at an instant t=0.

A Sample Of Radioactive Element Has A Mass Of 10 Physics Question

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:

  1. A coil of N turns and mean cross-sectional area A is rotating with uniform angular
  2. If a spring of spring constant k stretched by a length x under tension T, the energy
  3. Three capacitors 3μF,6μF and 6μF are connected in series to a source of 120V.
  4. 10 mA current can pass through a galvanometer of resistance 25 ohm.
  5. The Boolean expression P+ P ̅ Q, where P and Q are the inputs of the logic

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.

NEETLab Mobile App

Share this page with your friends

Be the first to comment

Leave a Reply

Your email address will not be published.


*