Power generation principle of imported heating wire

The heating wire itself has the ability to withstand high temperature and a lot of heat generation, and is often used for heating, but the function of the resistance wire is not used for heating. At present, the main materials commonly used for heating wires are various metals, such as nickel-chromium wire, iron-chromium wire, pure nickel wire, constantan wire, manganese copper, Monel and so on.

When the current passes through the resistor, the work consumes electricity and generates heat, which is called the thermal effect. After a lot of practice, it is concluded that the heat generated by the current passing through the conductor is proportional to the size of the current itself, the resistance value of the conductor's own material, and the time value of the current flowing through. The people who came to this conclusion are Joule, a scientist from the United Kingdom, and Lenz, a scientist from Erros, so this conclusion is generally called Joule's law and Lenz's law.

In order for the resistance wire to heat up, it must have a suitable resistivity. If the resistivity is too large or too small, the shape of the required resistance wire will become very large or small, very short or very long, which is used in many electric heaters regardless of power. This is one point; another point is that for the melting point requirement, the melting point must be high, and it cannot be melted as soon as it heats up.