Nuclear forces (binding the nucleus): Which nuclear particles mediate the strong force that holds nucleons together in older (Yukawa) models? Focus on the historical concept of force carriers inside the nucleus. Choose the correct option.

Difficulty: Easy

Electrons
Positrons
Neutrons
Mesons

Correct Answer: Mesons

Explanation:

Concept/Approach
In Yukawa’s theory, mesons (not electrons/positrons) mediate the strong nuclear force that binds protons and neutrons (nucleons) within the nucleus. (Modern QCD describes gluons; in classic physics MCQs the answer is mesons.)

Final Answer
Mesons

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