00:01
Hello students, so in this question here an electron is placed in uniform electromagnetic field.
00:06
So two forces are acting on electrons.
00:08
So one is forced due to magnetic field on electron and the other is forced due to electric field on electron due to electric field.
00:16
So here it is f e equals to eq.
00:22
So here is the magnitude of electric field and q is the charge on electron force on electron due to magnetic field.
00:30
And f equals to b q v here b is the magnitude of magnetic field and q is charged on electrons and v is the feed of electrons so here the direction of electron is shown in this figure now the electron is negatively charged now the electron is negatively charged so its experience are forced due to electric field in negative z direction but since it's accelerated in positive so positive z direction so the effective force must also be in the same direction.
01:09
So by using right hand rule, by using right hand rule, right hand rule, we can say that the direction of v should be in negatively by direction.
01:23
So the net force on electron is fb minus fe equals to m .a.
01:36
So here it will come pqv minus eq equals to m .a.
01:45
So rearrange of equation for magnetic field...