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4Me1 Magnetic Field – Magnetic Model Car

$50.00 $38.00

What are the phenomena?

Magnetism is a class of physical phenomena that are mediated by magnetic fields.  Ancient people found out that permanent magnets can attract iron filings.  They understood the phenomena between permanent magnets (attractive force between same poles while repulsive force between opposite poles of magnets).  A magnet exerts its magnetic field to its surrounding.  A magnetic field comes from a permanent magnet or a moving charged particle or electric current in a conductor.  Electric current produces electric field while a magnet produces magnetic field.

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Description

磁場是一種看不見、摸不著的特殊物質,磁場不是由原子或分子組成的,但磁場是客觀存在的。磁場具有波粒的輻射特性。磁體周圍存在磁場,磁體間的相互作用就是以磁場作為媒介的,所以兩磁體不用接觸就能發生作用。

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