00:01
So we're looking at some calculations, some resistivity, at resistivity, current, energy cost, right? so this is what we are given a 22 -gauge nickel wire, want to determine the resistivity, okay? so the relation is resistivity as opposed to resistance and the area.
00:36
The wire, rather than the length, alright, here this is resistivity.
00:44
Registivity, if you call the resistance per unit length.
00:54
Yeah, this is...ty, okay? so, this is resistance.
01:11
Resistivity is in a home meter.
01:20
This is resistance, resistance.
01:37
Resistance this is area this is uh all right so let's look for now for this particular we're given the radio we're given the radios to be equal to 0 .3 2 mm mm meters and of course we can look for the diameter so the diameter is going to give us two arrow diameter of the wire two times arrow which is something as a two counts 0 .321 millimeter so the diameter will hear us 0 .642 millimeters now i haven't gotten that one now the resistance of if you go to look look it up on the table the resistance arrow for 22 gauge recon wire is a arrow which is the resistance is equal to 1 .0 .155 0 .5, 0 .5, home per feet, at 60 bits when you use, far right, temperature, temperature, all right.
04:37
Now, based on this on now, we can look for water, and if you check, so for that particular diameter, okay, we've already got in and the diameter there, the average diameter given is a europoint, for average diameter of 0 .6, 4, 264 millimeters, okay? let you look at this one, you can see that it's about the same thing as well, we have 0 .640, it's not too far from, okay? because it's very minor so much is so we can just come ahead now i haven't gotten those details that problem let us see what what for this is par the value we have here is our feet so we'll see what per meter per and we'll know that one fits one is equal to 0 .3 3 0 48 4 8 meters, okay? so let's see what one per meter will not give us since this particular resistance is for our feet.
06:39
So per meter on that gives what? so per meter will give us 1 .0155, s 1 over 0 .304 .2.
07:11
So the surface at my, i'm going to have to be 3 .5.
07:15
3 3 o 1 7 o so that's what is going to give up per meter so we have maybe we have so soon we combine it to per meter now so we have 3 .33 17 home so we'll combine it to parmita now so having done this now we can look for our resties you can plug in to that formula for resistivity so resistivity now is equal to three points three one seven times pi d now the area is equal to pi d square of four the wire five d square so if we log this in now you are going to have and so for the area of the wire which is five diameter we're able to tell the diameter to be 0 .6, 0 .6, 246 2 .6, 0 .640, square over 4.
09:32
So that's an area.
09:34
That's a area.
09:37
Divid by l.
09:43
But remember that we have been, this one has already taken care of l.
09:47
So we're just to but remember that this one is in m .m so this is in m.
09:59
This is in m.
09:59
This diameter is in m.
10:01
So let's convert it to meter.
10:02
So we convert this to meter this one to meter.
10:06
It is diameter to meter.
10:08
Let's convert it.
10:10
If we want to answer.
10:13
So let's remove this one and convert it to meter.
10:18
It gives us 0 .0000.
10:23
Okay.
10:33
6 4, 6 4, 2, 6 4, 6, 4, 6 square...