Chumbak loha

Ek magnet (Greek  , "Magnesian stone" se) ek material nai to object hae jon ki magnetic field produce kare hae. Ii magnetic field dekhae nai hae lekin ek magnet ke khaas property ke kaaran hae : ek force jin ki  ferromagnetic materials, jaise kiiron ke attract kare hae, aur duusra magane ke repel kare hae. 

References

Aur parrho
 "positive pole n". The Concise Oxford English Dictionary. Ed. Catherine Soanes and Angus Stevenson. Oxford University Press, 2004. Oxford Reference Online. Oxford University Press.

 Wayne M. Saslow, Electricity, Magnetism, and Light, Academic (2002). ISBN 0-12-619455-6. Chapter 9 discusses magnets and their magnetic fields using the concept of magnetic poles, but it also gives evidence that magnetic poles do not really exist in ordinary matter. Chapters 10 and 11, following what appears to be a 19th-century approach, use the pole concept to obtain the laws describing the magnetism of electric currents.

 Edward P. Furlani, Permanent Magnet and Electromechanical Devices: Materials, Analysis and Applications, Academic Press Series in Electromagnetism (2001). ISBN 0-12-269951-3.

Bahaari jorr
 HyperPhysics E/M, good complete tree diagram of electromagnetic relationships with magnets
 Maxwell's Equations and some history
 Detailed Theory on Designing a Solenoid or a coil gun
 Video: The physicist Richard Feynman answers the question, Why do bar magnets attract or repel each other?
 Articles, tutorials and other educational information about magnets  National High Magnetic Field Laboratory
 Answers to several questions from curious kids about magnets
 Magnetic units discussed 
 EU requires warning on toys containing magnets
 Information on Permanent Magnets
 About Magnets 
 International Magnetics Association 
 Online magnetic pull force calculator

Category:Rasayan vigyan