CUET · PHYSICS · PYQ PAPER 2023

Many features of the nuclear binding force are summarised below : Choose the correct statement.
(A) Coulomb force acting between two protons inside the nucleus is much weaker than Nuclear force between them
(B) Between proton-proton inside nucleus gravitational force is stronger than nuclear force
(C) Nuclear force between two nucleons falls rapidly to zero as their distance is more than a few femtometer
(D) Nuclear forces between proton-proton, neutron - proton and neutron-neutron is approximately same when distance between them is same.
Choose the correct answer from the options given below :

A (A), (B), (C) Only
B (A), (C), (D) Only
C (A), (B) Only
D (B), (D) Only

Verified Solution

Answer & Solution

Correct Answer

(B) (A), (C), (D) Only

Step-by-step Solution

Detailed explanation

(A) is Correct: At the very short distances inside a nucleus, the strong nuclear force is about 100 times stronger than the electrical repulsion (Coulomb force) between protons. (C) is Correct: The nuclear force is short-ranged. It is powerful at around 1 femtometer (fm) but…

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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List-I (Physical quantity)	List-II (Unit)
(A) Magnetic moment	(I) N A\(^{-2}\)
(B) Magnetic field strength	(II) N m rad\(^{-1}\)
(C) Torsion constant	(III) A m\(^{-1}\)
(D) Magnetic permeability	(IV) A m\(^2\)