Energy Release in Nuclear Reactions – Rankers Physics

Nucleus: Practice Problem & Solution

Assertion (A): Energy is released when heavy nuclei undergo fission or light nuclei undergo fusion. Reason (R): For heavy nuclei, binding energy per nucleon increases with increasing (Z) while for light nuclei, it decreases with increasing (Z).
Both (A) & (R) are true and the (R) is the correct explanation of the (A)
Both (A) & (R) are true but the (R) is not the correct explanation of the (A)
(A) is true but (R) is false
Both (A) and (R) are false

Solution Explained:

To solve this problem, we apply the core principles of Nucleus. Understanding the underlying formula is key to arriving at the correct answer below:

Assertion (A) is true as both fission and fusion release energy. Reason (R) is false because binding energy per nucleon for heavy nuclei decreases with increasing (Z) (after Fe) and increases for light nuclei (up to Fe). Thus, (A) is true, (R) is false.

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