MP Board · Class 12 · Physics · NucleiWrite down three salient features of nuclear forces that distinguish them from electrostatic and gravitational forces.

Nuclear forces are the powerful forces responsible for binding protons and neutrons together inside the atomic nucleus. Their three primary salient features are:

1. Short Range: Nuclear forces are strictly short-range forces. They operate effectively only over very short distances, typically of the order of a few femtometres ($1 \text{ fm} = 10^{-15}$ m). Beyond this range, their strength drops rapidly to zero, unlike electrostatic and gravitational forces which follow inverse-square laws and have an infinite range.
2. Charge Independence: The nuclear force between two protons, between two neutrons, or between a proton and a neutron is approximately the same. This proves that nuclear forces are independent of the electric charge of the interacting nucleons.
3. Strongest Nature: Nuclear forces are the strongest forces found in nature. At distances less than 1 fm, their attractive magnitude is roughly 100 times stronger than electrostatic forces and vastly greater than gravitational forces, which enables them to overcome the massive electrostatic repulsion between positively charged protons packed inside a tiny nucleus.