00:01
Hello everyone.
00:02
In this problem, we're asked to find the electric field away from a uniformly distributed ring of charge that has a total charge of 1 .25 times into minus 10 quolums or 0 .125 nano coolums.
00:16
We're also told that the ring has a radius of 2 .50 centimeters, so that's 2 .50 times into minus 2 meters.
00:22
And we're interested in the electric field produced by this ring at a distance along the center of the ring at a distance of 40 centimeters away from it from that center.
00:35
So at a distance of 40 times center of minus 2 meters away from the center of the ring.
00:41
So we're going to be looking at along the symmetry axis of this ring.
00:46
Now we also know that the kulon kostner, which is 1 over 4 pi epsilon 0, is equal to 8 .5 .0.
00:52
0 .99 times that's 9.
00:54
Units meter squared per quorum squared.
00:57
And this is actually worked out as an example beforehand, before the exercises.
01:05
And so you can find the expression for what the electric field is to be essentially k times q times x over x squared plus a squared to the power of three halves, pointing in the positive x head direction...