Question

The nuclear force is repulsive for separation distance -

• A. $=0.8\text{fm}$
• B. $<0.8\text{fm}$
• C. $>0.8\text{fm}$
• D. None of these

Answer 1

The correct option is B $<0.8\text{fm}$

The potential energy is a minimum at a distance $r_0$ of about $0.8\text{fm}$.

This means that the force is attractive for distances larger than $0.8\text{fm}$ and repulsive if they are separated by distances less than $0.8\text{fm}$.

Hence, option $\left(B\right)$ is the correct answer.