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Induction burners aren't hot unless there's a pan on there. And they can use sensors to look for a pan (since it has to be ferrous to work with induction) before even turning on the coils.

Because it does not transfer heat at all, it creates a magnetic field that causes the pan to heat itself, with induction effect. The stove will only turn on its magnetic field when something that is affected by the magnetic field is placed on top.

An induction stovetop can be left on, but it won't get hot unless there's actually magnetic cookware on top.

If the cooktop doesn’t detect a load (i.e. a pan) on the burner, it automatically turns itself off.