Assertion (A) Forces acting between proton-proton (fp p), proton-neutron (fp n) and neutron-neutron (fn n) are such that fp p

Question

Assertion (A) Forces acting between proton-proton (fp p), proton-neutron (fp n) and neutron-neutron (fn n) are such that fp p < fp n=fn n Reason (R) Electrostatic force of repulsion between two protons reduces net nuclear forces between them. (A) If both Assertion and Reason are true and Reason is correct explanation of Assertion. (B) If both Assertion and Reason are true but Reason is not the correct explanation of Assertion. (C) If Assertion is true but Reason is false. (D) If both Assertion and Reason are false.

Tardigrade Admin · Accepted Answer

The net force between two nucleons is equal to the algebraic sum of the nuclear and electrostatic forces acting between them. Between proton-neutron and neutron-neutron, only the nuclear force of attraction act. But between proton-proton, apart from the nuclear force, electrostatic force of repulsion also acts. This tends to reduce the net force between the two protons.

Q. Assertion (A) Forces acting between proton-proton (fpp​), proton-neutron (fpn​) and neutron-neutron (fnn​) are such that fpp​<fpn​=fnn​ Reason (R) Electrostatic force of repulsion between two protons reduces net nuclear forces between them.

If both Assertion and Reason are true and Reason is correct explanation of Assertion.

If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.

If Assertion is true but Reason is false.

If both Assertion and Reason are false.

Q. Assertion $(A)$ Forces acting between proton-proton $(f_{pp})$ , proton-neutron $(f_{p n})$ and neutron-neutron $(f_{nn})$ are such that $f_{pp} < f_{p n} = f_{nn}$
Reason $(R)$ Electrostatic force of repulsion between two protons reduces net nuclear forces between them.