Question

Two protons exerts a nuclear force on each other, the distance between them is

• A. ${10}^{-14}m$
• B. ${10}^{-10}m$
• C. ${10}^{-12}m$
• D. ${10}^{-8}m$

Answer 1

The correct option is A ${10}^{-14}m$

From the options, only at a distance of ${10}^{-14}m$ the nuclear force will act. This is equal to ten Fermis, as 1 Fermi = ${10}^{-15}m$, and this falls within the short range within which it acts.