Table of Contents
Is wire wound type variable resistor?
There are mainly three different types of resistance track used in this resistor they are carbon track, cermet (ceramic and metal mixture) track and wire wound track. Carbon track and cermet track are used for high resistance application whereas wire wound track is used for low resistance variable resistor.
What is wire wound variable resistance?
A wirewound resistor is an electrical passive device that limits or restricts current flow in a circuit. The conductive wire can be made of varying alloys and thickness to control the resistance value. Wirewound resistors are typically used in high power and industrial applications such as circuit breakers and fuses.
Is wire a resistor?
A wire in real life, unless it is a superconductor, is a resistor because it has a non-zero value of resistance. However, it has a considerably less resistance than most of the other components of the circuit, so one often ignores that in ordinary cases, but not in all.
Are wire wound resistors linear?
Most types of resistor are linear devices that produce a voltage drop across themselves when an electrical current flows through them because they obey Ohm’s Law, and different values of resistance produces different values of current or voltage.
What makes a resistor variable?
A variable resistor is a resistor of which the electric resistance value can be adjusted. When only two terminals are used, it functions as a variable resistance and is called a rheostat. Electronically controlled variable resistors exist, which can be controlled electronically instead of by mechanical action.
Which material is used for making wire wound resistors?
Wirewound resistors are commonly made by winding a metal wire, usually nichrome, around a ceramic, plastic, or fiberglass core. The ends of the wire are soldered or welded to two caps or rings, attached to the ends of the core.
How do you identify a wire wound resistor?
In the sort of cylindrical resistor with colored stripes to give the value, a wirewound will usually have a wide first stripe. Specifically, a resistor in a “one watt” package but that wide stripe will actually be a two watt resistor (because it can stand that additional heat).
What is a wire wound resistor made of?
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. Common core materials include ceramic, plastic, and glass. Wirewound resistors are the oldest type of resistors that are still manufactured today.