Department of Pre-University Education, KarnatakaPUC Karnataka Science Class 12
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# In One Average-life, - Physics

ConceptMass-energy and Nuclear Binding Energy Mass - Energy

#### Question

In one average-life,

• half the active nuclei decay

• less than half the active nuclei decay

• more than half the active nuclei decay

• all the nuclei decay.

#### Solution

more than half the active nuclei decay

The average life is the mean life time for a nuclei to decay.
It is given as tau = 1/lambda = T_"1/2"/0.693

Here, tau , lambda and T_"1/2"

are the average life, decay constant and half life-time of the active nuclei, respectively. The value of the average lifetime comes to be more than the average lifetime. Therefore, in one average life, more than half the active nuclei decay.

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#### APPEARS IN

HC Verma Solution for Concepts of Physics - Vol. 2 (2018 to Current)
Chapter 24: The Nucleus
MCQ | Q: 11 | Page no. 441
Solution In One Average-life, Concept: Mass-energy and Nuclear Binding Energy - Mass - Energy.
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