Wire Wound Resistor Symbol

Non reactive resistors have special winding designs to cancel each other s magnetic fields.

Wire wound resistor symbol. Back to main picture. If only two terminals are used one end and the wiper it acts as a variable resistor or rheostat. Wirewound resistors are very variable in construction and physical appearance. Electronic symbol iec standard ansi standard a potentiometer is a three terminal resistor with a sliding or rotating contact that forms an adjustable voltage divider.

A wire wound resistor is an electrical passive component that limits current. Construction of wire wound resistor. The metal wire acts as the resistive element to the electric current. The resistance is directly proportional to the length of the wire these are the main 2 principles used in the construction of the wire wound resistor.

Now for metal or conductor the resistance directly proportional to the. For example 8k2 as part marking code in a circuit diagram or in a bill of materials bom indicates a. The wire material has a high resistivity and is usually made of an alloy such as nickel chromium nichrome or a copper nickel manganese alloy called manganin. Wire has certain resistance which is of finite value.

Hence the metal wire restricts the electric current to certain level. The wire wound resistor is made by winding the metal wire around a metal core. Wire wound resistor is a type of passive component in which metal wires are used to reduce or restrict the flow of electric current to a certain level. The constructional details are as shown in the figure.

The measuring instrument called a potentiometer is essentially a voltage divider used for measuring electric. The massive drawback of a carbon resistor is its high negative coefficient of resistance which makes the resistance change quickly with the difference in the temperature. This value can vary a lot it may be small or it may be large depending on the material of the wire used. A common wire wound resistor has inductance due to the magnetic field produced by the winding.

What is the symbol of carbon resistor. One common scheme is the rkm code following iec 60062 it avoids using a decimal separator and replaces the decimal separator with a letter loosely associated with si prefixes corresponding with the part s resistance. For any particular type or value of resistor the greater the power rating the larger the physical size of the resistor. The two ends of the wire are connected to 2 connecting terminals.

The nichrome wire is wound firmly over a ceramic or cement tube. A rheostat is a variable wire wound resistor connected in series with the load to limit the flow of current. The carbon resistors are cheaper to make and can have a higher resistance than that of wire wound resistors. Fig 2 0 1 resistor symbols.