Why does a metallic piece become very hot when it surrounded by a carrying high frequency alternaiting current ?

Why does a metallic piece become very hot, when it is surrounded by a coil carrying high frequency alternating current?

Why does a metalic piece become very hot when it is surrounded by a coil carrying high frequency (H.F.) alternating current?

A metal rod is placed along the axis of a solenoid carrying a high-frequency alternating current. It is found that the rod gets heated. Explain why the rod gets heated .

A metal rod is placed along the axis of a solenoid carrying a high-frequency alternating current. It is found that the rod gets heated. Explain why the rod gets heated .

A metal rod is placed along the axis of a solenoid carrying a high-frequency alternating current. It is found that the rod gets heated. Explain why the rod gets heated .

Why does an engine become hot while the vehicle is running?