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Nuclear Force

Let Fpp,Fpn...

Question

Let $F_{p p}, F_{p n}$ and $F_{n n}$ denote the magnitudes of the nuclear force by a proton on a proton, by a proton on a neutron and by a neutron on a neutron respectively when the separation is less than one Fermi. Then

A

F_{p p} > F_{p n} = F_{n n}

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B

F_{p p} = F_{p n} = F_{n n}

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C

F_{p p} > F_{p n} > F_{n n}

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D

F_{p p} < F_{p n} = F_{n n}

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Solution

The correct option is D $F_{p p} = F_{p n} = F_{n n}$
At separation less than one fermi, the nuclear force of attraction is strongly active and Nuclear force is charge independent force.
Hence , $F_{p p} = F_{p n} = F_{n n}$

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Similar questions

Q. Let F_pp, F_pn and F_nn denote the magnitudes of the nuclear force by a proton on a proton, by a proton on a neutron and by a neutron on a neutron respectively. When the separation is 1 fm,
(a) F_pp > F_pn = F_nn
(b) F_pp = F_pn = F_nn
(c) F_pp > F_pn > F_nn
(d) F_pp < F_pn = F_nn

Q. Let F_pp, F_pn and F_nn denote the magnitudes of the net force by a proton on a proton, by a proton on a neutron and by a neutron on a neutron respectively. neglect gravitational force. When the separation is 1 fm.
(a) F_pp > F_pn = F_nn
(b) F_pp = F_pn = F_nn
(c) F_pp > F_pn > F_nn
(d) F_pp < F_pn = F_nn

Q. Assertion :Forces acting between proton-proton

(f_{p p})

, proton-neutron

(f_{p n})

and neutron-neutron

(f_{n n})

f_{p p} < f_{p n} = f_{n n}

Reason: Electrostatic force of repulsion between two protons reduces net nuclear forces between them.

F_{p p}, F_{n n}

F_{p n}

denote, respectively, the nuclear forces between two protons, between two neutrons and between a proton and a neutron, then

F_{p p}, F_{p n},

F_{n n},

denote the magnitudes of net force by a proton on a proton, by a proton on a neutron and by a neutron on a neutron respectively. Neglect gravitation force. When the separation is 1 fm:

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