Its not an emp effect. For it to be a EMP it must pulse/explode, its a continuos effect not a sudden event. Its much more of a radiation effect, like was mentioned above. The magic at Hogwarts is like living in the center of a nest of high voltage power line. There is so much energy flying around at random that is screws with the complicated voltage/amperage over tiny, tiny even microscopic distances.
The other thing is that it each electronic component is made of dozens of different substances. A single resistor is made of many layers.. even dozens of layers. There are dozens of them on a circuit board. Made of exotic highly refined substance that the Wizarding World probably hasn't heard of. This means that one of them with a change in voltage/amperage will screw the device up, a few even worse. one resistor amping the amperage and the circuit burns out.
Not image several randomly enchanted at different levels of power... small explosions and bursting into flame may ensue.
Doug has improved components by accidentally improving them. Doug understands what he is doing. The random saturation enchantment at Hogwarts and other magic heavy areas is like tossing a radio into a washing machine full of heavy water and pixie dust and hoping good things happen.
That or like the wild surge table of a 2nd edition D&D wild mage. You role a dice and hope for the good effects. Only your rolling 5 or 6 times each for over a hundred components. Or twice on the table for the whole thing. Eventually, something useful will happen statistically, but a lot of things will explode on the way... or turn into butterflies with wings of bacon or your watch may grow leaves or your talking alarm clock takes up singing and starts calling you 'Dave'.
Electronics don't explode there... they go bonkers. We can debate if this is on purpose or not. However considering that there are rather few electronics in the flying car and it worked fine (even in the relatively magic heavy area of the Burrow) until getting near Hogwarts. Thus we know its only over a certain saturation of magic that this effect occurs.
Personally, I have to wonder if over exposure to magic can cause muggleborn witches and wizards... an overly obliviated man becomes a squib, a pregnant woman that had a long night of being 'pranked' by purebloods has a baby wizard, or the kids offspring do. I mean the ones doing the pranks notice that their favorite targets starts making mudbloods... and they up the hating just so their oblivious cohorts don't notice that the only way they are special is in the short bus way. Same way all noble families started off as commoners.
The other thing is that it each electronic component is made of dozens of different substances. A single resistor is made of many layers.. even dozens of layers. There are dozens of them on a circuit board. Made of exotic highly refined substance that the Wizarding World probably hasn't heard of. This means that one of them with a change in voltage/amperage will screw the device up, a few even worse. one resistor amping the amperage and the circuit burns out.
Not image several randomly enchanted at different levels of power... small explosions and bursting into flame may ensue.
Doug has improved components by accidentally improving them. Doug understands what he is doing. The random saturation enchantment at Hogwarts and other magic heavy areas is like tossing a radio into a washing machine full of heavy water and pixie dust and hoping good things happen.
That or like the wild surge table of a 2nd edition D&D wild mage. You role a dice and hope for the good effects. Only your rolling 5 or 6 times each for over a hundred components. Or twice on the table for the whole thing. Eventually, something useful will happen statistically, but a lot of things will explode on the way... or turn into butterflies with wings of bacon or your watch may grow leaves or your talking alarm clock takes up singing and starts calling you 'Dave'.
Electronics don't explode there... they go bonkers. We can debate if this is on purpose or not. However considering that there are rather few electronics in the flying car and it worked fine (even in the relatively magic heavy area of the Burrow) until getting near Hogwarts. Thus we know its only over a certain saturation of magic that this effect occurs.
Personally, I have to wonder if over exposure to magic can cause muggleborn witches and wizards... an overly obliviated man becomes a squib, a pregnant woman that had a long night of being 'pranked' by purebloods has a baby wizard, or the kids offspring do. I mean the ones doing the pranks notice that their favorite targets starts making mudbloods... and they up the hating just so their oblivious cohorts don't notice that the only way they are special is in the short bus way. Same way all noble families started off as commoners.