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Physics - Modern Physics Question with Solution | TestHub

PhysicsModern PhysicsRadioactivityEasy2 minPYQ_2020

PhysicsEasysingle choice

A sample of radioactive material has mass $m$ , decay constant $λ$ and molecular weight $M$ . Avogadro's constant $= N_{A}$ . The initial activity of the sample is

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Answer:

Solution:

In a radioactive sample, activity is directly proportional to the number of active nuclei.
Activity $= λ N$ , where $N = \frac{N_{A} m}{M}$ .

Activity $= \frac{λ m N_{A}}{M}$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:Modern PhysicsSubtopic:Radioactivity

⏱ 2mℹ️ Source: PYQ_2020

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