JEE Main202523 Jan 2025Evening ShiftPhysicsNuclear PhysicsActual
Given below are two statements. One is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : The binding energy per nucleon is found to be practically independent of the atomic number A, for nuclei with mass numbers between 30 and 170. Reason (R): Nuclear force is long range. In the light of the above statements, choose the correct answer from the options given below :
Options
- A(A) is true but (R) is false
- B(A) is false but (R) is true
- CBoth ( A ) and ( R ) are true and ( R ) is the correct explanation of ( A )
- DBoth (A) and (R) are true but (R) is NOT the correct explanation of (A)
Correct answer
A. (A) is true but (R) is false
Step-by-step solution
From graph between B.E/N & A we can see BE/N is almost constant correct Reason incorrect as nuclear forces are short range forces.