2016 · Q43
Which one of the following statements about bar magnet is correct?
General KnowledgePhysics
- AThe pole strength of the north-pole of a bar magnet is larger than that of the south-pole
- BWhen a piece of bar magnet is bisected perpendicular to its axis, the north and south poles get separated
- CWhen a piece of bar magnet is bisected perpendicular to its axis, two new bar magnets are formed
- DThe poles of a bar magnet are unequal in magnitude and opposite in nature
Explanation
Magnetic poles always occur in north-south pairs; an isolated magnetic monopole has never been observed. When a bar magnet is cut perpendicular to its axis, each piece becomes a complete magnet with its own north and south poles, so two new bar magnets are formed. The pole strengths remain equal in magnitude and opposite in nature. The correct statement is therefore option (C).