00:01
In this question we have given that an electron is traveling at 1 .5 into 10 to the 0 .6 meter per second when it enters an electric field that slows it.
00:11
The field has a magnitude of 3 ,000 newton per column then we have to tell that how far does the electron penetrate the field before it stops.
00:22
Given that speed is, that is b is 1 .5 into 10 to the 4 6 meter per second and the electric field e is 3 ,000 newton per coulame.
00:42
Now, as we know that mass of electron is 9 .1 into 10 to the power minus 31 kilogram and charge of electron is, that is, 2 .6 into 10 to the power minus 19 cullam.
01:06
Now, due to the electric wheel, the force acting on the electron is, that is q into e, and this is equal to mass into acceleration.
01:22
So from here we can say that the acceleration will be qe upon m.
01:29
Now using third equation of motion, we can say that as this is opposite to the motion, so this is negative, this is the retardation here.
01:50
So v squared is equal to this is u squared plus 2 as...