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Physics - Modern Physics Question with Solution | TestHub

PhysicsModern PhysicsAtomic structureEasy2 minPYQ_2020

PhysicsEasysingle choice

The distance of closest approach of an $α$ -particle fired towards a nucleus with momentum $p$ , is $r$ . What will the distance of closest approach when the momentum of $α$ -particle is $2 p$ ?

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Answer:

Solution:

$K E = P E$

Or $\frac{p^{2}}{2 m} = \frac{1}{4 π ε_{0}} . \frac{q_{1} q_{2}}{r} \Rightarrow r \propto \frac{1}{p^{2}}$

Hence, at given condition distance of closest approach is $\frac{r}{4}$ .

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:Modern PhysicsSubtopic:Atomic structure

⏱ 2mℹ️ Source: PYQ_2020

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