00:01
Hello, here we have to solve the following problem.
00:03
We have to determine direction of the force that electron experience.
00:07
Here velocity is to the right and field b is into the page.
00:17
It means that we use our left hand, our right hand, because it's an electron in the way that four fingers are along the velocity and the force is directed downwards.
00:42
So, because field comes into our hand, that's the direction of the force downwards.
00:54
And now, in equation two we have to determine how would be measured the field.
01:00
So basically here, gravity should be equal to the field to the magnetic force which is qvb.
01:09
Meanwhile, it means that b is mg over qe...