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Class XII Physics Atomic Nucleus 1

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Question 1

A nucleus disintegrates into two nuclear parts which have their velocities in the ratio 2 : 1. The ratio of their nuclear sizes will be

Question 2

A neutron having kinetic energy 13.6 eV collides with a hydrogen atom in ground state at rest. Assume that the mass of neutron and hydrogen atoms are same and the neutron does not leave its line of motion. Then which of the following is the possible KE of the neutron after the collision

Question 3

If M0 is the mass of an oxygen isotope 8O17, MP and MN are the masses of a proton and a neutron respectively, the nuclear binding energy of the isotope is

Question 4

A nucleus with Z = 92 emits the following in a sequence; α, α, β, β, α, α, α, α, β, β, α, β+, β+, α. The Z of the resulting nucleus is

Question 5

The compound unstable nucleus Description: D:\GradeStack Courses\JEE Mains (Sent by Ravi)\JEE Mains Full Test\AIEEE-Full-Test-2-New_files\image192.png often decays in accordance with the following reaction Description: D:\GradeStack Courses\JEE Mains (Sent by Ravi)\JEE Mains Full Test\AIEEE-Full-Test-2-New_files\image193.pngother particles. In the nuclear reaction presented above, the other particles might be

Question 6

The activity of a radioactive sample is R1 at a time T1 and R2 at a time T2. If the half-life of the specimen is T, the number of atoms that have disintegrated in the time (T2 – T1) is proportional to

Question 7

The half-life period of a radio-active element X is same as the mean life time of another radio-active element Y. Initially they have the same number of atoms. Then

Question 8

When U238 nucleus originally at rest, decays by emitting an alpha particle having a velocity u, the recoil velocity of the residual nucleus is

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