電磁場如何即時破壞電子零件

聽說美軍正測試一種EMF BOMB能產生大量的電磁波,以干擾飛彈內的電子零件和導航系統,這是否又是真有其事呢?

Very intense electromagnetic fields cause electromagnetic induction in electric circuit. The induced charges/current would lead to [short-circuit], thus damaging the electronic equipment.

能否靠電磁石或永久磁石在短時間內把硬碟的內容完全清除?
如果可以,用多強的磁力才能做到呢?要用多久才能清除呢?

You have to use a very strong magnet, or alternating current type of electromagnetic to ersea all the data on a hard disk.

不能靠電磁石或永久磁石在短時間內把硬碟的內容完全清除!用充磁機就得