Depends on the chemistry, as different chemistries give different cell voltages.
If it's Alkaline, there'll be 8 cells inside.
If it's Lead-Acid, there'll be 6 cells inside.
If it's Ni-Cd or NiMH there'll be 10 cells inside.
This is assuming that all the cells are connected in series. Otherwise, all bets are off.
Disposable C batteries are 1.5 volts (the rechargeable kind can vary). The number of amps they put out depends on the resistivity of the circuit they are attached to.
The formula you are looking for is W = I x E. I = W/E. A = W/V.
You can charge a 12 volt battery with a 6 AMP charger. The amount of amps put out by the charger is actually the rate which the power flows out from the charger, not the amount of volts it will charge. Volts and Amps are two different things. You can't charge up a 12 volt battery all the way, using a 6 volt charger. You can charge a 12 volt battery with a 12 volt charger rated at '6 amps'. It will charge the battery faster than a 2 amp charger will, but it will take longer than using a 12 amp charger. You probably don't want to use anything higher than a 12-16 amp charger for charging a 12 volt battery. Some chargers are equipped with a 60amp boost charge that is used for starting the vehicle, without having much of a charge in the battery. You DO NOT want to attempt charging a battery with it set to a 60amp boost charge. That is for starting vehicles only and could damage your battery. Keep in mind that the lower the amps are, that you use to charge the battery (1-2amps), will result in the charge lasting longer without recharging it, than if it was charged up at a higher setting (12-16amps).
The 220 Volt secondary in a single phase transformer rated 2kVA, should be able to deliver about 2000/220 or 9.1 Amperes, assuming unity power factor.
The answer depends upon the construction of the 6 volt battery. If you can treat it as two 3 volt batteries then the answer is YES otherwise NO. Charge each section separately inserting a low wattage torch bulb between the charger and battery cell to limit the current. Choose the bulb to prevent execissive charging rate; an ammeter would come in handy. The main risk is EXPOSION if you charge too fast! Put the battery to be charged inside a strong box for safety. If in doubt buy a new battery charger, they are cheap.
2.083 amps
A fully charged 12 volt battery will output 12.6 volts are read with a digital volt meter.
They make a 7.5 volt battery when put together
You can charge a 12 volt battery with a 6 AMP charger. The amount of amps put out by the charger is actually the rate which the power flows out from the charger, not the amount of volts it will charge. Volts and Amps are two different things. You can't charge up a 12 volt battery all the way, using a 6 volt charger. You can charge a 12 volt battery with a 12 volt charger rated at '6 amps'. It will charge the battery faster than a 2 amp charger will, but it will take longer than using a 12 amp charger. You probably don't want to use anything higher than a 12-16 amp charger for charging a 12 volt battery. Some chargers are equipped with a 60amp boost charge that is used for starting the vehicle, without having much of a charge in the battery. You DO NOT want to attempt charging a battery with it set to a 60amp boost charge. That is for starting vehicles only and could damage your battery. Keep in mind that the lower the amps are, that you use to charge the battery (1-2amps), will result in the charge lasting longer without recharging it, than if it was charged up at a higher setting (12-16amps).
you put a volt meter on it
Yes, you can use a twelve volt car battery charger. Be sure to set it on low.
No. Unless you put it in a sock and hit someone with it.
Nothing as long as it was a 12 volt battery.
Disposable C batteries are 1.5 volts (the rechargeable kind can vary). The number of amps they put out depends on the resistivity of the circuit they are attached to.
Yes, as long as it is the correct size battery with the correct cold cranking amps.
if you put steel wool at the tip of a 9 volt battery
That will depend on the sum of the load resistance and the internal resistance of the battery (this is true for all power sources, not just 6 volt batteries). Small compact batteries tend to have higher internal resistance and therefore are more limited in the current they can deliver to a given load than larger batteries.