Lighter

Gas lighter

 

It is based on law of conservation of energy. 

"Energy can be neither created nor destroyed. But only can be transformed from one form to another"

 

What do we do while lighting gas stove using lighter?

We press it with some energy, mechanical energy.

And what we are getting is electric spark, electrical energy. So in a gas lighter, mechanical energy is converted to an electrical energy. And now, next question. What’s inside the lighter which converts the energy?

It is a piezoelectric crystal, quartz. Piezo (mechanical)electric crystal acts as a transducer( a device which converts one form of energy in to another.

Cigarette lighter

Same principle as gas lighter. It is designed as one press, one spark.

But lighters working under piezoelectric principle do not work at great heights (above 800 feet’s). The higher the altitude, less likely the lighter to work.