There are a variety of metal pairs that are used to make thermocouples. Two common pairs are chromel-alumel, known as type K , and copper-constantan, known as type T. A good reference is Omega Engineering (omega.com) or azom.com.
Voltage is not intended to be applied to a thermocouple. Heat is, and that will result is a voltage being developed which can be used to measure the heat.Actually what will happen depends on the polarity of the voltage applied to the thermocouple. One polarity will heat the thermocouple, the opposite polarity will cool the thermocouple. This phenomenon can be used to make a tiny refrigeration system needing no refrigerant fluid or moving parts (other than a fan to expel the unwanted heat) called a thermoelectric cooler.A practical thermoelectric cooler is not built with ordinary thermocouples used to measure temperature or generate electricity. Instead it uses large thermocouples having a contact area between the dissimilar metals measured in square inches. Two of these large thermocouples are connected back to back in opposite polarity with a thermal insulator between them. When power is applied, one gets cold while the other gets hot.Thermoelectric coolers are used in microprocessor heatsinks and in small portable refrigerators that are powered from a car's cigarette lighter outlet. In fact most of these small portable electric refrigerators have a switch that reverses power to the thermoelectric cooler, making it a heater instead; thus they can keep food either cold or hot, whichever is appropriate.
ironi and iron
fets are used due to their high speeds
Probably the most important use is in the electric generator. They are used in metal detectors, and speakers. In generators they are used to generate a constant charge. In metal detectors they are used as a sensor; where the field is changed by metals in the ground. And in speakers they are used in a to and fro motion on a diaphragm to make sound.
Power transformer is used step up or down the voltage for the electricity transmission while furnace transformer is used to melt the metals and ores in the electric furnace.
Thermocouples are commonly used for measuring temperatures up to 1200 degrees Celsius. They work by measuring the voltage generated at the junction of two dissimilar metals, which changes with temperature. Thermocouples are widely used in various industries due to their accuracy and durability at high temperatures.
Thermocouples generate electrical energy through the Seebeck effect, where a temperature gradient between two different metals or semiconductors creates a voltage difference. When connected in a closed loop, this voltage drives a current to flow, generating electrical energy. This phenomenon is widely used in temperature measurement and control applications.
sensor used to measure temperature. Thermocouples consist of two wire legs made from different metals. The wires legs are welded together at one end, creating a junction. This junction is where the temperature is measured.
Steel and aluminum are used to make funs.
Aluminium.
The two most common metals used to make knives are steel and iron.
Examples: thrmometers, pyrometres, thermocouples.
Most common use is in Exhaust Gas Temperature probes.
copper is used as base metal in gold jewelry
Metals are used for the production of screws as they are materials with high hardness and resistance to stress.
Iron, nickel, and cobalt are the most common metals used to make ferromagnets. These metals have magnetic properties that allow them to be easily magnetized and retain their magnetism.
Lead