Stove top kettles are primarily used to heat water for tea or Hot Chocolate. An electric kettle works the same way however the risk of shock is a constant threat because water and electricity do not work well together.
Conduction
A stove.
Conduction
The kettle uses heat energy. Depending on your type of stove, that heat will usually come from chemical energy (in a gas stove), or electrical energy (in an electrical stove).
The kettle was invented to boil water, first ones were placed directly onto a stove top (much like a pot); later electric ones use an element to heat the water
Kettle. Or you could use a saucepan over the stove if you've not got one.
the stove is used if it is a heat kettle otherwise it is electrical based
Yes.
Which kettle do you mean? Or did you mean 'Who invented the kettle'? As with most cooking utensils, it is unlikely that a specific person 'invented' the kettle, since that sort of thing developed as necessary through the ages.
There are many available stove top grill available online for purchase. One of the example of a good quality stove top grill is by the company Chefmaster.
Convection
Crystallization