00:01
In this problem, we have a plastic rod that has this length, and we want to compute what is its linear charge density that we are going to call it lambda.
00:13
If the road is inside a plastic bag here, and the total flux, electric flux through the surface of the bag has this value here.
00:29
Okay, so in order to solve this problem, we're going to use two equations.
00:34
The first equation is the coal gauss law and give us the electric flux on a closed surface.
00:44
That is, in this case, the back surface.
00:48
And it says that this total electric flux is just the electric charge divided by the permittivity.
00:55
Okay? and the permittivity is a constant, is 8 .85, 10 to the minus 12.
01:05
This is 12, column square divided by newton and mirror square.
01:12
Okay.
01:13
And the second equation gives us the electric charge on a body.
01:17
In this case, is that rot.
01:20
And this body has a linear density lambda, and if we multiply this linear density, density by the total length, we will get the total charge.
01:31
Okay? so in order to compute this charge density lambda, we're going to use first the second equation, this equation here...