What I want you to see is that there are color bands on here.
And we use those color bands to be able to tell the voltage or
the value of these resistors.
Now let’s look at a color code.
Now these particular resistors
that I'm using are gold-banded, and they also come in silver-banded.
And that corresponds to the tolerance, because resistors are not ideal,
there's going to be some variation in their values.
These particular ones,
these silver and the gold-banded ones have four bands to them.
The first two bands are the significance numbers and
the third band is a multiplier or we can also say the number of zeros.
And then the fourth band is the tolerance.
There are ten color codes here.
And they are shown here.
So this particular examples with the red, brown, orange,
silver, corresponds to the red, and the brown corresponds to a two and one.
And then the orange corresponds to three zeroes afterwards.
So this is a 21,000 ohm resistor or 21k with the silver band meaning 10%.
Now I should note that there is an other type of common resistor tolerance and
that's 1%, and 1% we would have five bands instead of four bands.
This resistor here is a brown, black, red, and gold.
So brown, black would be 1 0.
Red would be 2 0 afterwards.
So this is a 1K resistor.
Let me go ahead and measure it.