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Chapter 1: Problem 28

Quarks - Quarks force is produced between - (a) Proton - neutron (b) proton - proton (c) neutron - neutron (d) (a),(b), (c) are true

Short Answer

Expert verified
Quark force is present in all combinations mentioned: proton-neutron, proton-proton, and neutron-neutron pairs. Thus, the correct answer is (d) (a), (b), (c) are true.

Step by step solution

01

Understanding Quarks and Quark Force

Quarks are fundamental particles and a vital component of protons and neutrons, which are the building blocks of atomic nuclei. These subatomic particles interact through strong nuclear force, also known as the quark force, via the exchange of gluons. The force is responsible for keeping quarks together to form protons and neutrons and holding the protons and neutrons together in an atomic nucleus.
02

Combination 1: Proton - Neutron

Protons and neutrons are made up of quarks (three quarks each). Protons consist of two up quarks and one down quark, while neutrons consist of two down quarks and one up quark. The strong nuclear force (quark force) is present between the quarks within the proton and neutron.
03

Combination 2: Proton - Proton

Similar to the proton-neutron combination, protons also interact with one another via quark force. The quarks within each proton are held together by a strong nuclear force, and while the repulsive electromagnetic force is also present due to both protons being positively charged, the quark force dominates at very short distances, as found within an atomic nucleus.
04

Combination 3: Neutron - Neutron

Neutrons, like protons and neutron-proton pairs, are made up of quarks and experience strong nuclear force (quark force) between their constituent quarks. The quark force is responsible for holding neutrons together within the atomic nuclei.
05

Conclusion

Quark force is present between all the combinations mentioned in the exercise, i.e., it is present between proton-neutron, proton-proton, and neutron-neutron pairs. Therefore, the correct answer is: (d) (a), (b), (c) are true.

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