00:01
The diameter of the wire is given as 1 .29 x 10 -3 m.
00:10
We find the radius of this wire by dividing this by 2.
00:16
We get this as 1 .29 x 2 x 10 -3 m, which is same as 6 .45 x 10 -4 m.
00:36
The decimal has to be shifted.
00:38
Now length is given as the length whose resistance we have to calculate.
00:43
Total length is 27 .74 m.
00:49
Rho is given as the density of the wire is 1 .68 x 10 -8.
00:57
Rho m is the unit of density.
01:03
We have a formula for resistance that we have to calculate as rho lya.
01:09
This is our formula for resistance of the wire.
01:11
We put the values.
01:13
Rho is 1 .68 x 10 -8.
01:16
Length we know is 27 .74...