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Magnetic effects of electric currents
http://www.learnnext.com/nextgurukul/wiki/concept/CBSE/X/Science/Magneti...
http://www.seai.ie/Schools/Post_Primary/Subjects/Physics/Unit_4_-_Electr...
http://www.ekshiksha.org.in/eContent-Show.do?documentId=73
http://www.tutorvista.com/content/science/science-ii/magnetic-effects-el...
http://www.nios.ac.in/media/documents/secscicour/English/Chapter-17.pdf
http://en.wikipedia.org/wiki/Electric_current
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