JEE Main 2022PhysicsNuclear PhysicsEasyMCQ

JEE Main 2022 — Nuclear Physics Question with Solution

JEE Main 2022 (27 Jul Shift 2)

Question

The activity of a radioactive material is 6.4×10-4 curie. Its half life is 5 days. The activity will become 5×10-6 curie after

Choose an option

Show full solutionCorrect option: D
Correct answer
D35 days

Step-by-step explanation

Given here, A0=6.4×10-4 Curie and A=5×10−6 Curie

Half life, T12=5 days 

The activity of a radioactive sample at time t is given by,

A=A012tT12

⇒5×10-66.4×10-4=12t5

⇒7=t5⇒t=35 days

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About this question

This is a previous-year question from JEE Main 2022, 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.