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PhysicsModern PhysicsRadioactivityMedium2 minQB

PhysicsMediumsingle choice

Three fourths of the active nuclei present in a radioactive sample in 3/4 s. The half life of the sample is:

Answer:

Solution:

3/4 decayed means 1/4 left $= (1/2)^{2}$ , i.e. two half-lives in 3/4 s:

$T_{1/2} = \frac{3/4}{2} = 0.375 s$

Hence option (D).

Stream:JEESubject:PhysicsTopic:Modern PhysicsSubtopic:Radioactivity

⏱ 2mℹ️ Source: QB

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