What does a resistor symbol look like?
A basic resistor is usually a length of nichrome wire wound around a ceramic tube.
From the side view, it appears as a zigzag line, which is why the resistor is a zigzag symbol.
There are two symbols for the resistor, the one with zigzag lines, and another with a rectangular box..
What is a resistor with an arrow through it?
The arrow means that the component is variable; its value can be adjusted. The variable resistor, on the right, is usually implemented using a three-terminal variable resistor, or potentiometer, with one of the terminals either left open or connected to the wiper.
What can be used as a resistor?
All electrically conductive materials are somewhat resistive, too. Because of this, even a good electrical conductor, such as metal wire, can be used as a resistor. Resistance can be adjusted by limiting how thick the wire is, and by increasing or decreasing the conductive path through the wire.
What is resistor and how it works?
A resistor is a passive two-terminal electrical component that implements electrical resistance as a circuit element. In electronic circuits, resistors are used to reduce current flow, adjust signal levels, to divide voltages, bias active elements, and terminate transmission lines, among other uses.
What are the 4 types of resistors?
Different Types of Resistors – Fixed, Variable, Linear & Non-Linear Resistors & ApplicationsCarbon Composition Resistors.Wire wound Resistors.Thin Film Resistors.Carbon Film Resistors.Metal Film Resistors.Thick Film Resistors.Metal Oxide Resistors.Cermet Oxide Resistors (Network Resistors)More items…
Why do you need a resistor in a circuit?
The main function of resistors in a circuit is to control the flow of current to other components. … If too much current flows through an LED it is destroyed. So a resistor is used to limit the current. When a current flows through a resistor energy is wasted and the resistor heats up.