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Physics - Modern Physics Question with Solution | TestHub

PhysicsModern PhysicsRadioactivityMedium2 minQB

PhysicsMediumsingle choice

A radioactive element of mass number 208 at rest disintegrates by emitting an $α$ -particle. If E is the energy of the emitted $α$ -particle, the energy of disintegration is :-

Options:

Answer:

Solution:

Momentum conservation: $p_{α} = p_{D}$

$\frac{K _{D}}{K _{α}} = \frac{m _{α}}{m _{D}} = \frac{4}{204}$

$K_{D} = \frac{E}{51}$

$Q = K_{α} + K_{D} = E + \frac{E}{51} = \frac{52}{51} E$

Option (A)

Stream:JEESubject:PhysicsTopic:Modern PhysicsSubtopic:Radioactivity

⏱ 2mℹ️ Source: QB

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