Be carefully, that is not exactly true. Voltage cannot be created without
energy, it is a force. However once it is 'in place' it requires no energy to
sustain. (Given the freshman physics caveats of frictionless pullies, massless
ropes, etc.)

That said in the situation at hand of an AC voltage being induced by an EM field
you are correct. The energy required to produce a voltage is a function of the
impedance.

- Dan

Cecil Moore wrote:
Roy Lewallen wrote:

But voltage isn't energy. Or power.


True, but voltage cannot exist without energy.