Undoubtedly, the world wouldn’t be as liveable as it is now if electricity wasn’t invented. Important results of the innovation of electricity such as lighting and heating have all made the world as much livable as possible. Electrical energy flows in a circuit by the use of conductors. More often than not, there is of a necessity a need to inhibit the free flow of electricity through conductors so that certain results can be obtained. Blocking of the flow of electrical energy in circuits requires the use of circuital components commonly known as resistors. Thus what makes resistors so important and where can we use them?
First and foremost, custom resistors can be necessary for the control the outputs that are generated in certain electrical circuits. Generally, resistors can be classified as being fixed or of variable values. In variable valued resistors, the amount of resistance that is obtained from these components can be increased or decreased according to the needs of a circuit. These changes in the amount of resistance are in effect going to cause the outputs of those circuits to vary accordingly. An example of this is seen in the controlling of the sound amplifier.
Secondly, heating using electricity would be impossible without the use of resistors. Normally, resistance to the flow of electricity is a process that produces a lot of heat. Electricity can thus be converted into heat by the use of resistors. The heat produced is important for producing light- where bulbs make use of the heat to give light through there filaments. The heat in electrical heaters is also generated in this way.
The other interesting application of custom resistors is where they may be used as voltage dividers in electrical connections. A voltage divider is essentially created when a chain of custom resistors are joined in a series connection to form a daisy chain. You will realize that if the resistors used for this purpose in a single circuit have an equal value, the amount of voltage across them is also equal. However, when the values are different, the voltages will also differ. The aim of such a connection is to ensure that what was produced at the mains is subdivided into smaller amounts of voltages that can be consumed by appliances with lower power specifications.
Lastly, resistors are also a necessary component for transistors and LEDs to function. These components are usually affected by either too low or too high amounts of electricity passing through them. In order that these two components can work and continue to work, it is imperative that resistors are wired with them to allow only the amount of currents that they can tolerate.