Answer to Question #97629 in Electricity and Magnetism for Abdulwahab Elmshirghi

Question

How to heat up a piece of metal to certain degrees that is located at the center of magnetic field , thanks

Answer 1

There is no direct equation on that since the process heating a piece of metal up depends on the type of metal, its dimensions and shape (cylinder, ball, prism), the frequency and intensity of the field and so on. But the magnetic field itself will not heat it, especially if it's constant magnetic field from a permanent magnet or a DC coil. Alternating electromagnetic fields are required. Too high frequency will heat just the surface of the specimen, too low frequency will not heat it at all, and again it depends on the properties and size of the specimen we have.

The easiest way to get certain temperature is to use infrared thermometer: as soon as the required temperature is achieved, turn off the coil. For more info see the theory of induction heating.