Question

The nuclear forces
(a) are central forces, independent of the spin of the nucleons.
(b) have a short-range dominant over a distance of about a few fermi
(c) are stronger being hundred times stronger than that of electromagnetic forces.
(d) are independent of the nuclear charge.
Which of the above is not true?

• A. c
• B. a
• C. b
• D. d

Hint:

Nuclear force = strong + short range + charge independent + spin dependent.

Answer 1

The Correct Option is B

Step 1: Understanding nuclear forces.
Nuclear forces act between nucleons and show properties like strong interaction, short range, and spin dependence.

Step 2: Checking statement (a).
It says nuclear forces are independent of spin, which is incorrect because nuclear forces are spin-dependent.

Step 3: Checking statement (b).
Nuclear forces act over very short distances (~1–3 fermi), so this is correct.

Step 4: Checking statement (c).
They are about 100 times stronger than electromagnetic forces, so this is correct.

Step 5: Checking statement (d).
They are charge independent, so this is also correct.

Step 6: Identifying wrong statement.
Only statement (a) is incorrect.

Step 7: Final conclusion.
\[ \boxed{\text{Option (B)}} \]