Induction heater Dissipated power increasing frequency

[StoyanElectroTech]

Hi .
Is it convenient to ask the following question :
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Image source :
https://www.mdpi.com/2227-9717/10/6/1151

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What will happen with

Generated heat/Dissipated power in/from the workpiece
(increase /decrease/stay the same)

if we keep increasing frequency while maintain (perhaps by adjusting input voltage)

Constant rms current through the primary coil/winding ?

Thank you.