Other times the battery will just burn out. A car battery stores 12 volts of DC current at over amps. DC stands for Direct Current. This means that the current from the battery always flows in one direction.
So in order to illuminate a light bulb, current flows from the positive side of the battery, through the bulb, and back to the negative side of the battery, completing a circuit. So if you were to hook a light bulb directly to the battery using jumper wires, one wire on positive, and the other on negative, the bulb would illuminate. How come a wrench touching both battery posts will fry, but a light bulb will only light. The answer is resistance. Resistance is a force that hinders the flow of electricity.
Small wires have higher resistance, therefore are capable of carrying less current. The filament in a light bulb is very thin, so the current that leaves the bulb, after going through the high resistance filament, is much less than the current that enters the bulb. The glowing filament in the bulb is actually the same thing that happens to the wrench, only a much smaller version due to resistance.
If you touched a thin strand of wire between the battery posts, unlike the wrench, you would only get a small spark, the wire would get hot, and melt pretty quickly due to the high resistance in the small wire. Power is delivered to the light bulb from the positive side of the battery via the wiring harness, but the current is returned to the negative side of the battery through the body of the vehicle.
The negative side is the ground. The negative battery cable is connected directly to the engine or the body so mostly everything in the vehicle that is made of metal is grounded. If you touch both terminals with a metal wrench, for instance, you can create a spark that can ignite hydrogen gas in the battery. That can send pieces of battery and acid flying. Tom: What you saw in class is the difference between theoretical physics and applied physics. Your teacher knows all about electrical theory.
Ray: Your father, on the other hand, has stripped off his shirt, laid his bare chest on a pair of battery terminals, and turned the hose on himself. Tom: My brother and I had a similar demonstration years ago. He had just rented his first apartment, and I was over there helping him slap some paint on the walls.
As the day wore on, it got dark. There are many ways you can be injured by car batteries:. If the hydrogen gas is ignited by a spark, the entire battery can explode, showering you with sulfuric acid. If you run afoul of that voltage, typically by touching a spark plug wire or coil wire with frayed insulation, while also touching ground, you will definitely feel a bite. Your email address will not be published.
This site uses Akismet to reduce spam. Learn how your comment data is processed. Welcome to Recor Batteries Click to listen highlighted text! Welcome to Recor Batteries. Source: lifewire. Long life batteries for each type of vehicles.
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