12V is probably short for 12 volts, the voltage used by regular car batteries.
And since 12V can strike a spark, it can be used to start a fire.
Fire steel is a piece of steel that can be used to create a spark for making fire.
Postulates
Yes it can. Sunlight when directed to an area with a magnifying glass can create fire. also Laser is also light and can be used to burn or create fire.
"Fire" is the answer. Just like scrap is used to make paper, fire is used to create smoke.
In Lord of the Flies the fire was used for it's smoke, to create a signal in the hope of being rescued, (which was more Ralph's desire for fire) where as Jack used the fire just as a cooking fire.
Yes
Flint, a hard, sedimentary cryptocrystalline form of the mineral quartz can create a fire by producing sparks when rubbed together when wet.
Quartz!
quartz
Obviously they used fire and rocks for sparks, but u wouldn't guess that they actually used whale oil too
if used for charging-NO if used for supply voltage-yes
+12V, -12V, +5V, -5V, +3.3V -5V is seldom used