how gas stove lighter spark and if fingers put on it gives electric Shock?

Question

lighter

Answer 1

I assume you mean the one that's built into the gas stove....
It works on the principle of piezo electric ignition. A piece of quartz crystal is hit by a (small) spring loaded piece of metal, and this causes the quartz to release a high voltage, which in turn produces a spark to ignite the gas.
Touching it is not necessarily life threatening, just a bit unpleasant.

Answer 2

it is bit of same answer except the fact the spindle does not strike but it passes with a inertia and thus produces a voltage equal to static voltage

for example if u rub your comb on hair and pick up a paper it will pick up on the comb such simple technology is applied in this piezo electric stone it can give unpleasant shock feeling but not dangerous

Answer 3

Gas stove lighter gives both static current and heat. Static current is produced when sudden friction is produced.