Like how you can fry your electronics if they’re plugged in when the power comes back on from an outage, why can’t we “unplug” everything so to speak?
In: Planetary Science
Imagine this, the transformer circuit which create electricity from AC to DC, has 2 coils.
The first coil connect to the wall which alternates current, the 2nd coil produce DC current which connect to your digital devices.
When the first coil is producing +ve and -ve, it cuts the electromagnetic field and induce current to the 2nd coil giving it a certain flat voltage(assuming there is a bridge rectifier to correct all the sawtooth waveform and transform to a dc voltage).
Now, emf hits, it induce a very large current to the 2nd coils and fry your transformer in which potentially kill the circuit breaker. You can’t power up your device anymore.
Anything that has coil inside will have this effect.
This is very dangerous to sensitive digital equipment as their operation voltage and current are usually less than 3.3v.
It’s basically a lightning strike in EMF Form.
So what kills it? If current is high, so is voltage. alternating current may kill human but dc will burn things with high amperage.
So how to prevent this? Have a shield, what shield? Watch a movie and you know, faraday shielding.
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