There is a color coding for resistors. In an electrical circuit, a resistor controls the maximum possible current. The limiting factor in current is resistance. The energy of electrons moving through a 500 ohm resistor is converted to heat and light. The tungsten filament in an incandescent light bulb, for instance, functions as a resistor, heating up because of the current flowing through it, and emitting light as a result.
Multiple Series and Simultaneous Processes
It is possible to use resistors in a circuit in several different ways by connecting them. When resistors are connected in series, they do so sequentially. When resistors are connected in parallel, they cross over one another.
Resistors come in a wide variety of forms. Engineers can see how much power a resistor can safely handle and how close to its true value is, thanks to the power rating.  It’s common knowledge that the resistance between two resistors increases when they’re connected in series, whereas it decreases when they’re connected in parallel. Resistors based on surface-mount technology are increasingly used in modern electrical applications due to their miniaturization and low profile. 
Principle of Inductance, or Ohm’s Law
Ohm’s law states that the voltage drop across a component is equal to the product of the current flowing through the component times the resistance of the component. If necessary, you can get a different result from Ohm’s law by rearranging the equations as follows: It can be written as I=V/R or R=V/I .
Identification of Resistor Values by their Colors
The value of a resistor can be determined by its color coding. Black, brown, red, orange, yellow, green, blue, purple, grey, and white bands are used on the Resistor’s sides. The colors stand for different numbers. Black signifies 0, brown 1, red 2, and so on until white symbolizes 9. Those are crucial figures in the realm of electronics.
Each Resistor has a different number of color bands down its side. While four or five resistors per unit are typical, higher counts are possible. The final band on a four-band resistor is typically made of gold or silver. The gold band indicates the tolerance range is -5 to +5 percent. A resistor’s silver band indicates a 10% tolerance, either plus or minus.
Color-code calculations can be made with the help of online tools. The calculator will determine the Resistor’s value and tolerance once you plug in the color codes.
It’s easy to see how versatile resistors are after seeing some of their many applications. They are first installed in circuits to safeguard LEDs and other sensitive components from potential harm.  A resistor’s value determines the amount of current that flows through it; therefore, if you want a lower current flow, you can choose a larger value resistor. In addition to regulating time delay and dividing voltage, resistors can also be used to connect two circuit nodes.
Extremely large resistors are used in electric heaters to convert electricity into heat. In most applications, engineers strive to reduce the heat produced by resistors to minimize power waste. Soldering resistors is another option for working with electronics.
Numerous varieties of resistors are available. They all have a resistive substance inside a plastic or nonconductive casing. Typically, a fixed resistor will be a carbon rod enclosed in plastic, with a lead wire protruding from either end. Carbon resistors are the industry standard for use in modern electronics. In the past, resistors were made from other metals that were poor conductors to limit the current.