Magnetic lines of force are crowded most closely together where the field is:
Aweakest, far from the magnet
Buniform, midway along the magnet
Cstrongest, near the poles
Dabsent, outside the magnet
Answer & Solution
Correct answer: C. strongest, near the poles
1. The spacing of field lines represents the strength of the magnetic field.
2. Lines drawn close together mean a strong field; lines far apart mean a weak one.
3. The field of a bar magnet is strongest at its poles.
4. So the lines crowd together near the poles and spread out away from the magnet.
5. This is why iron filings gather most thickly at the ends of a bar magnet.
_Source: NECTA CSEE 2021 Physics 031, Question 1: Multiple Choice, item (iii)_
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