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Physics - Modern Physics Question with Solution | TestHub

PhysicsModern PhysicsRadioactivityEasy2 minPYQ_2020

PhysicsEasysingle choice

A radioactive sample at any instant has its disintegration rate $5000 dpm$ . After $5 minutes$ , the rate is $1250 dpm$ . Then, the decay constant (per minute) is

Options:

Answer:

Solution:

$\frac{1250}{5000} = \frac{1}{2^{n}}$

$(n = 2)$

$T_{\frac{1}{2}} = \frac{t}{n} = \frac{5}{2} = 2.5 m i n$

decay constant ,

$λ = \frac{l n 2}{T_{\frac{1}{2}}} = \frac{l n 2}{2.5} = 0.4 l n 2$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:Modern PhysicsSubtopic:Radioactivity

⏱ 2mℹ️ Source: PYQ_2020

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