00:01
The diameter of wire b is given as 2 .05 millimeter.
00:09
The length of the copper wire is given as 24 meters.
00:15
Now we know that the resistivity of copper wire, resistivity of copper wire, that is raw copper.
00:26
This is 1 .7 into 10 power minus 8 oom meters.
00:34
So the expression to calculate the resistance of the wire is given by r equals r rl by a, that is the resistivity of the wire into the length of the wire by area of the wire.
00:51
Now the area of the wire, a is piar square.
00:59
Now given the diameter of the wire, so we have r as half of the diameter, that is 2.
01:05
0 .05 millimeters divided by 2 which is equals to 1 .025 millimeters or 1 .025 into 10 power minus 3 meters.
01:19
Now we can calculate the area of the wire...