The effect that you get when you apply voltage from a battery to water is bubbles. the bubbles are caused by the hydrogens and oxygens seperating. to get more bubles there are a number of things you can do. 1st if you add salt to the water it will bubble more as well if you attach two 9 volts together and add the salt you get even more bubbles and the last thing you could do is rap your wire around graphite rods which you can get out of pencils if you feel like shaving the wood off but any way i hope i answered your question.
There will be no effect on the voltage. That is the effective voltage will be only 12 volt. But there will be increase of current.
The batteries can be connected in parallel or in series. In parallel, good batteries of the same voltage will have a total voltage across them equal to the voltage across one of them. Those batteries in series will have a total voltage equal to the sum of the voltage of each of the batteries.
Batteries in parallel maintain constant voltage across the load rather in a series, so it is better to arrange the batteries in parallel Batteries in series deliver a higher voltage, batteries in parallel have longer life use.
depends on the voltage of the batteries.. four 12 volt car batteries would output 4x12 = 48 v
Batteries provide a voltage difference.
The water is actually an electrolytic fluid. The fluid conduct the voltage between the batteries plates. Water is sometimes added as the fluid dissipates.
Batteries provide a voltage difference.
The voltage remains the same.
Assuming all of the individual batteries are the same voltage, if arranged in a parallel circuit the voltage is the same as any one battery. If arranged in a series circuit the voltage will be the sum (the total) of all of the batteries added together.
That depends on what voltage your batteries are,
Voltage is how much power the batteries have. I think....
multiplies source voltage, two 12v dc batteries in series become a 24v circuit; also multiplies resistence