00:01
Hello.
00:02
So here, according to the question, it is saying that calculate the resistance of a copper wire which is one kilometer long.
00:09
Okay.
00:10
So here the length is given.
00:13
That means one kilometer length is given.
00:16
And question is saying it has a diameter of 0 .55 diameter is given.
00:22
Dimeter is given which is 0 .50 m.
00:28
All right.
00:29
If the resistivity is also given, resistivity is also given.
00:32
Of the copper is 1 .7 multiplied by 10 k .5 oom meter.
00:38
So we need to find the resistance, all right? we need to find the resistance.
00:43
So first, we will change the unit conversion is very important in this because we need to change length into meter.
00:51
So it will be 1 ,000 meter and diameter is given.
00:55
So we know that radius is equals to d by 2.
00:59
That means diameter by 2.
01:00
Diameter is 0 .0 .50 divided by 2.
01:05
That means approximately 0 .25 mm...