What exactly happens to electrons in presense of an EMP field? Say you have a flashlight that is switched on, my general assumption is that if some sort of an EMP device goes off, the flashlight will turn off. Why ? Does the battery get discharged in a fraction of a second? If not, why won't the electrons flow then, when the chain is closed? On top of that I remember reading a few times from various sources that during Nucular Bomb testing, EMP effect was provailant for more than 20 minutes after the initial explosion. How? Take an electro magnet for example, turn it on, place a paper clip to it, the clip will be held up. Turn the magnet off and the clip will fall, it wont be stuck up for the next half our (Unless of coarse the magnet becomes magnetized). Or does the EMP effect take so long to dissapear because of all the radioactivity still in the air?