How a Spark Plug ACTUALLY Creates Fire From Electricity #shorts #science #engines

This tiny metal spike — smaller than your thumb — is what makes every car engine alive.

But how does a piece of metal turn electricity into a controlled explosion — thousands of times a minute — without destroying itself?

Here's what actually happens. Your ignition coil takes the car's 12-volt battery current and steps it up to around 45,000 volts. That surge travels down the spark plug's center electrode — a rod of nickel or iridium alloy — toward a gap of about one millimeter at the tip. At that gap, the voltage is so intense it ionizes the air itself, ripping electrons free and creating a superheated plasma channel. That plasma arc hits around 60,000 degrees Fahrenheit — hotter than the surface of the sun. In less than a millisecond, it ignites the compressed air-fuel mixture surrounding it. The explosion drives the piston down, turning the crankshaft, and your car moves. Then the whole cycle resets — and does it again. And again. At highway speed, each plug fires roughly 30 times every second.

But here's the part that should stop you cold: that electrode tip is being blasted by a 60,000-degree plasma arc, up to 30 times per second, for the entire life of the engine. A standard copper plug survives roughly 30,000 miles of that. Iridium plugs? Six times harder than steel — they endure over 100,000 miles. Engineers didn't just design a spark — they designed something that survives being struck by miniature lightning, over and over, for years.

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