JEE Main 2021PhysicsNuclear PhysicsMediumMCQ

JEE Main 2021 — Nuclear Physics Question with Solution

JEE Main 2021 (22 Jul Shift 1)

Question

A nucleus with mass number 184 initially at rest emits an α-particle. If the Q value of the reaction is 5.5 MeV, calculate the kinetic energy of the α- particle.

Choose an option

Show full solutionCorrect option: D
Correct answer
D5.38 MeV

Step-by-step explanation

124 mv2+12180 m4v1802=5.5 MeV

⇒  124 mv21+4541802=5.5 MeV
⇒  K.E.α=5.51+45·41802 MeV=5.38 MeV

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About this question

This is a previous-year question from JEE Main 2021, covering the Nuclear Physics chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.