00:01
Okay, so for this one, we know the electric field between two points that are the same magnitude, and the goal is to get what those actual charges are.
00:08
So you have your plus q and your minus q, and we're told that they're separated by 16 centimeters, and then so this is 0 .16 meters, and then the distance that each of them is from that point is 0 .08.
00:27
So this is a point, not a negative.
00:30
0 .08 meters to immediately convert everything to s .i.
00:36
Just to eliminate or help eliminate issues with unit conversions.
00:43
Okay.
00:44
And so basically, let's think about this.
00:47
So each of these charges is going to have an electric field given by kulom's law.
00:52
E is k, 1 over 4 pi epsilon not, a q over r squared.
00:57
And the field due to the negative one is towards the negative one.
01:01
So that's to the left.
01:03
And the field due to the, oh, excuse me, this is the positive one.
01:09
Oh, ha, ha, ha, okay.
01:14
Positive one...