# Basics of Electrical Engineering

Learn the basics of Electrical Engineering.

4 Band resistor color coding chart is used to find the value of 4 band resistor.

### How to use it

The first band of the resistor is the first significant number of resistance. The second band represents the second significant number of resistance. Whereas the third band is a multiplier. Finally, the fourth column represents the tolerance value of resistors.

### Brown Black Red Gold Resistor

Let's decode a resistor with Brown Black Red Gold Resistor colored bands.

The first band brown represents the digit 1.
The second black band represents the digit 0.
The third red band is a 100 Ω multiplier.
The third band is gold multiplier with 5% tolerance.
Now our value is 10 * 100 Ω = 1000 Ω = 1kΩ ± 5%.

### Which side is right

Many resistors in the market have their tolerance band either in gold or silver color and one can easily find which side is right and from where to start decoding. However, a problem arises if the tolerance band is colored brown. For example, consider the case below:
Both end bands are brown. However, we can easily identify the tolerance band by measuring the distance of bands. The tolerance band is always designed apart whereas the other bands are located closer to each other.

So that was all about 4 Band coding. Also, learn: