Depends where you put it. Like if you put in on your tongue it will defiantly hurt.
Yes, if you apply it directly to a sensitive organ, such as the brain or heart. Pacemakers typically use small voltages to induce a beat in the heart.
sort of. Car batteries are 12 V and if you get a short across they can still be dangerous due to the wire heating up.
depends on the current, but almost definitely not (:
No. You need 12 volt AC to run a 12 volt AC motor, not 12 volt DC.
12 volt
It can be done with 90% efficiency.
no
Generally, there will be a 12+ volt rail, a 5+ volt rail and often a 3+ volt rail.
A 12 volt battery will not hurt you BUT any POWER supply (especially a 230 Volt one) has the potential to harm you.
12 volt
12 volt
You would wire them in "Parallel". That means positive post to positive post and negative to negative. Two 12 volt batteries wired this way doubles the capacity and amperage capability of the system. It does not cause any harm to the electrical system as the system sees them as one big battery.
No. You need 12 volt AC to run a 12 volt AC motor, not 12 volt DC.
12 Volt
Definately 12 volt.
use two 12 volt batteries in series.
1971s had 12-volt systems.
12 volt
It is 12 volts.
Positive 12 volt