It won't hurt anything, but it could be not safe as the possibility of the pan/pot spilling over.
The other factor is the transfer of heat will give you a hot area unless your pan/pot is clad with a Copper or Aluminum core to smooth out the hot spot.
You will also need to think about the volume you are heating here. Boiling a large pot of water will take longer and it may not be able to sustain (recover) the boil. Review the BTU's of the heat plate.
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