00:01
So here it is given a finite line on which the negative charge is uniformly distributed.
00:12
While we are given some points in across to this, let's say this is the third, second one, and this is four, five, and six.
00:25
So we need to use the symmetry of the problem and sketch the electric field vectors at the points indicated, that is the point two and five across from the lines of midpoints.
00:41
So for a part we need to draw the electric field, right? so first of all let me write down that, that is at point one comma two and three points, the electric field due to this negative charge infinite line, the vector, okay vectors lines are perpendicular towards line of charge in horizontal or in horizontally right, okay? sorry, in direction, okay? here it should be in direction horizontally right, while for four, five, and six electric field vectors will be perpendicular towards the line of charge in direction horizontally left, okay? so how could we draw that? this can be drawn like this, while from six to five this can be like this.
01:59
Now in part we have asked that can we see or can we use a cylinder as a gaussian surface for the finite line of charge? if it is so, then we have to explain how it is possible...