When a car battery in connected to itself (i.e. You connect jumper cables onto a battery and then connect the other two connectors to each other), you create a continual circuit with the battery and nothing else. A similar effect is when you hold a 9 Volt battery to your tongue and you feel a small but continual "zap". Imagine this effect, but much greater. Sparks will appear when the connectors are first connected.
Warning: Do not do this. This will damage your car battery. The only reason you should connect a car battery through jumper cables is to connect it to another car's battery in order to "jump" a car.
If you connect the terminals together with them unhooked from the battery and the engine off, yes that is also called a capacitive discharge.If you connect the terminals together with them unhooked from the battery and the engine off, yes that is also called a capacitive discharge.
it will arch out and melt the knobs on your battery and your cables
Overheat he battery to the point of busting it.
Nothing as long as you did not then connect the other cable.
If the voltage is appropriate, the bulb will shine.
your battery will make a big spark or your battery could blow up.
If you connect a negative battery terminal to another negative terminal, you would be creating a short circuit, which can lead to excessive current flow and potential damage to the battery or the connected devices. It is not a recommended practice and can be dangerous.
If it's a car/motorcycle battery you will be welding! If it's a small electronics battery nothing. Volts are not really the issue here, but amps are. And yes some old cars did or do have 6 volt batteries if not converted...
once a battery is connected even if the key is not in the ignition, there is always power at certain points in your car. Connecting a battery backwards will not start your car, but it can and will fry the wires to your starter.
If you connect positive to positive and negative to negative you will have a 9V battery with twice the current capacity in milliampere hrs than a single batteries. The load then goes between positive and negative paralleled terminals. If you connect one negative of one battery to one positive of the other battery and put the load between the remaining negative and positive terminals you have created an 18 V battery with the same milliampere hr rating as a single battery. If you connect one negative to positive of other battery and the negative of that battery to the positive of the first battery then both batteries with quickly drain and get hot in the process. Contrary to folklore or urban lefends, they do not explode.
flint and steel it is used to light fires
Very Dangerous........it would be a dead short. andcouldcause a fire or explosion.