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Two nucleons are at a separation of one Fermi. Protons have a charge of +1.6×10−19C. The net nuclear force between them is F1, if both are neutrons, F2, if both are protons F3, if one is proton and the other is neutron, Then :
  • a)
    F1 = F2 > F3
  • b)
    F1 = F2 = F3
  • c)
    F1 < />2 < />3
  • d)
    F1 > F2 > F3
Correct answer is option 'B'. Can you explain this answer?
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Two nucleons are at a separation of one Fermi. Protons have a charge ...
Explanation:

  • The nuclear force is the force between nucleons, i.e., protons and neutrons, in the nucleus of an atom.

  • The nuclear force is a strong force, and its range is very short, about 1 Fermi (1 Fermi = 10^-15m).

  • The nuclear force is attractive, i.e., it tends to pull nucleons towards each other.

  • The magnitude of the nuclear force depends on the distance between nucleons and whether they are protons or neutrons.

  • If both nucleons are neutrons or protons, the net nuclear force between them is the same, i.e., F1 = F2.

  • If one nucleon is a proton and the other is a neutron, the net nuclear force between them is less than F1 and F2, i.e., F3 < F1 and F2.

  • The reason for this is that protons and neutrons have different charges, and hence, they interact differently with each other.

  • The strong nuclear force is mediated by the exchange of mesons, which are particles that transmit the force between nucleons.

  • The exchange of mesons depends on the distance between nucleons and their charges, and hence, determines the magnitude of the nuclear force.

  • Therefore, the correct option is B, i.e., F1 = F2 = F3.

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Community Answer
Two nucleons are at a separation of one Fermi. Protons have a charge ...
Nuclear forces are charge independent so,
F1 = F2 = F3
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Read the passage given below and answer the following questions:Neutrons and protons are identical particles in the sense that their masses are nearly the same and the force, called nuclear force, does distinguish them. Nuclear force is the strongest force. Stability of the nucleus is determined by the neutron proton ratio or mass defect or packing fraction. Shape of nucleus is calculated by quadrupole moment and spin of nucleus depends on even and odd mass number. Volume of the nucleus depends on the mass number. Whole mass of the atom (nearly 99%) is centred at the nucleus.Q. Two protons are kept at a separation of 40 A0. Fn is the nuclear force and Fe is the electrostatic force between them. ThenNuclear forces are attractive in nature:- The magnitude which depends upon inter nucleon distance is of very high order.Since inside the nucleus they are bound to stay there so the attraction of Fn is higher than the repulsion of Fe.

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Two nucleons are at a separation of one Fermi. Protons have a charge of +1.6×10−19C. The net nuclear force between them is F1, if both are neutrons, F2, if both are protons F3, if one is proton and the other is neutron, Then :a)F1 = F2 > F3b)F1 = F2 = F3c)F1 2 3d)F1 > F2 > F3Correct answer is option 'B'. Can you explain this answer?
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