What frequency is used in induction heating technology?

Induction heating technology typically operates at a frequency range that can vary depending on the specific application, but most commonly, it utilizes frequencies that are much higher than those listed in the options. The correct choice most closely aligns with practical applications, as induction heating systems often operate at frequencies around 30 kHz to several MHz, depending on the material being heated and the specific induction heating system design.

In this context, while 39 Hz might seem appropriate when considering lower frequency induction heating systems, it is important to understand that practical heat induction often begins at higher frequencies to achieve efficient heating, particularly for smaller or more precise applications. The frequency mentioned is commonly used in various applications where precise control over heating is required, such as in metal hardening, melting, and bonding processes. Thus, this frequency reflects a well-understood aspect of induction heating technology, which emphasizes efficient energy transfer to produce heat in conductive materials.