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Nuclear Physics — JEE Main & Advanced NSEP PYQs

10 previous year questions from Nuclear Physics with answers and solutions. Numbered list, year tags, and one-tap solutions — built for serious JEE / NEET practice.

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Nuclear Physics — JEE Main & Advanced NSEP PYQs

The half-life period of a radioactive element E₁ is equal to the mean lifetime of another radioactive element E₂ . Initially both the elements have the same number of atoms. Theref

The fraction of the original number of nuclei of a radioactive atom having a mean life of 10 days, that decays during the 5^ th day is

Natural Uranium is a mixture of ₉₂²³⁸ U and ₉₂²³⁵ U with a relative mass abundance of 140: 1 . The ratio of radioactivity contributed by the two isotopes of natural uranium, if the

If the specific activity of C¹⁴ nuclide in a certain ancient wooden toy is known to be 3 5 of that in a recently fallen tree of the same class, the age of the ancient wooden toy is

When a sample of atoms is irradiated by neutrons, radioactive atoms are produced at a constant rate R , which decay with decay constant . The number of radioactive atoms accumulate

Fission of one nucleus of ²³⁵ U releases 200 MeV energy in average. Minimum amount of ²³⁵ U required to run 1000 MW reactor per year of continuous operation (assuming 30 % efficien

The Nucleus ₁₀²³ Ne decays by - emission through the reaction ₁₀²³ Ne ₁₁²³ Na + _ -1 ^0 + v + energy The atomic masses are ₁₀²³ Ne =22.994466 u and ₁₁²³ N a=22.989770 u , _ -1 ^0 =

Heavy stable nuclei have more neutrons than protons. This is because of the fact that

A target of ^7 Li is bombarded with a proton beam of current 10⁻⁴ ampere for 1 hour to produce ^7 Be of activity 1.8 10^8 disintegrations per second. Assuming that bombarding of 10

Two nuclides A and B are isotopes. The nuclides B and C are isobars. All the three nuclides A, B and C are radioactive. You may then conclude that