00:01
Here in this question, we're mainly considering the difference between the velocity of electricity and the velocity of the electrons.
00:11
They are really, really different.
00:14
And so for the first problem, it is asking you about the current.
00:20
And the current is equal to the charge divided by the time.
00:32
And the charge and the time we're giving.
00:37
Of it but which is really really i mean important to know here is what you're giving with the time is 80 minutes that is not 80 seconds where which were used as the ice i units so we are going to change it with the second and finally if you calculate this you get the answer for the first section of the problem.
01:35
Next, we're considering the second, the b section.
01:40
It is asking you about the velocity of the electrons.
01:45
What we know here is the velocity of the electrons.
01:48
It has this formula.
01:50
Here it is the current density.
01:57
So firstly, we need to know the current density, and it is calculated from the current, divided by, the area.
02:16
So if you calculate this first you will get the current density and it is now what we're going to do next is to know the velocity of the electrons...