00:01
For this problem on the topic of electric fields, we have two charges, one with a magnitude of minus three columns and one with the magnitude of five columns that are placed at the point x is equal to one meter and at the origin respectively, and we want to know the distance along the x -axis at which the electric field will be zero.
00:25
Now, we've marked three regions on the sketch, one, two, and three, and if we place a positive test charge anywhere in region two, the five kulam will repel it and the minus three kulam charge will attract it, so that the positive charge moves to the right.
00:40
If we place a negative charge in the same region, it will move to the left.
00:44
So we know that the electric field cannot be zero anywhere in region two.
00:48
Region one is closer to the five kulum charge, and since this is the charge with a larger magnitude, its electric field will dominate.
00:54
Region 1.
00:56
And so there's no place in region 1 where the electric field could be 0.
01:00
This leaves region 3, where the two electric fields from the point charges can cancel...