Two radioactive substances A and B of mass numbers 200 and 212 respectively, shows spontaneous α-decay with same Q value of 1 MeV. The ratio of energies of α-rays produced by A and B is ______.

(C) (2597)/(2600). Concept. K_α=Q(A-4)/(A) with the same Q. Step 1. Ratio. (196/200)/(208/212)=(196×212)/(200×208)=(2597)/(2600). Answer. Option C.

Nuclei question for JEE Main (JEE Main 2026 (8 Apr, Shift 2)), with solution

Q 12-13-028JEE MainJEE Main 2026 (8 Apr, Shift 2)Medium

Two radioactive substances A and B of mass numbers $200$ and $212$ respectively, shows spontaneous $\alpha$-decay with same $Q$ value of $1$ MeV. The ratio of energies of $\alpha$-rays produced by A and B is ______.

← Previous Next question →

Free JEE Main Physics Test Series 2027This chapter is in Test 6 · Sun 29 Nov 2026, 10 AM ISTRegister free →

PiTheory JEE Physics Practice & Revision Pack

Stop drowning in PYQs. Catch the unique ones.

4,100+ JEE PYQs, 2,390 unique ones: one of every model JEE keeps repeating, so you never solve the same question twice.

2,390 unique JEE questionsAt least one of every model JEE asks, chapter by chapter
Step-by-step solutionsThe method behind every answer, not just the key
210 topics with concept notesThe major equations and 184 clear diagrams
Where the marks come fromTopic-wise JEE weightage for every chapter
All 28 chaptersClass 11 and Class 12, organised topic by topic
Your personal PDFWith your name on it, sent on WhatsApp

Free to try: Laws of Motion and Current Electricity are open in full. Try one before you decide.

Explore the JEE Pack →Read a free chapter

Revise the formulasNuclei formula sheet: key equations and special cases→

Nuclei question for JEE Main (JEE Main 2026 (8 Apr, Shift 2)), with solution

Stop drowning in PYQs. Catch the unique ones.

More Nuclei questions