Q1. [1] straightforward exam-ready
Assertion (A): The magnetic field near the poles of a bar magnet is stronger than the field at the midpoint along its equator.
Reason (R): The density of magnetic field lines at a point represents the relative magnitude of the magnetic field at that point.
(A) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).
(B) Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A).
(C) Assertion (A) is true, but Reason (R) is false.
(D) Assertion (A) is false, but Reason (R) is true.
- A Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).
- B Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A).
- C Assertion (A) is true, but Reason (R) is false.
- D Assertion (A) is false, but Reason (R) is true.
Generated by claude-sonnet-4-6 · 2026-06-26 01:10 · grounding rag
Model Answer
(A) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).
Field lines are crowded near the poles, indicating a stronger field there, and the density of field lines represents the relative strength of the magnetic field.
Explanation
The textbook states: "The field is stronger where the field lines are crowded." Field lines are closest (most dense) near the poles and most spread out at the equatorial midpoint — so A is true. R is also true and directly explains A, as the crowding (density) of field lines is precisely the reason the pole region has a stronger field.