Question

Identify the correct statement!s) from among the following
(i) The constancy of the binding energy per nucleon in the range $ 30 <\, A < \,170 $ is a consequence of the fact that the nuclear force is short ranged
(ii) The nuclear force does not depend on the charge of nucleons
(iii) The nuclear force is repulsive when distance between two nucleons is less than $ 0.8 \,fm $

• A. (i) only
• B. (ii), (iii)
• C. (i), (ii)
• D. (i), (ii), (iii)

Answer 1

Answer: (D)

The attraction force between nucleons is maximum, when they are separated at distance of $0.8 \,fm$. When distance between two nucleons is less than $0.8 \,fm$, then potential energy increases rapidly with distance, hence a strong repulsive force starts working
Nuclear force does not depend upon charge. When atomic mass lies between $30-170$, then due to saturation of nuclear forces, nuclear forces are short ranges