How to check the ground valve of variable resistance underground?

Hey everyone,
i want to ask a question. If i have a variable resistance underground and i want to know its valve above ground in a wireless way, how can i do that? and will that consume alot of power or not?
thanks for the help anyone will give me.
bye

If your resistance is ungrounded then the energy (DC or Wireless) will not have a
path to send current so there will be no power consumption. (If I'm understanding
your question correctly). And when you ask for a "Value" do you mean Voltage?

Cheers