00:01
Hello students, in this question given that each step collects a charge of minus 15 nano coulomb.
00:09
So for the first part of the question, we have to calculate the total charge buildup if the worker walks 15 steps.
00:20
So 15 steps.
00:22
Therefore the total charge that is q total is equal to number of steps multiplied by the charge.
00:33
So here the number of steps is 15 steps multiplied by minus 50 nano coulomb and this will be equal to minus 750 nano coulomb.
00:45
This is the total charge buildup.
00:49
This is q total is equal to minus 750 nano coulomb.
01:00
And for the part b of the question, we need to find the number of electrons present in that amount of charge.
01:08
So we know that we know that the charge of one electron is approximately q is equal to that is which is equal to minus 1 .6 into 10 power minus 19 coulomb.
01:26
So we can divide the total charge by the charge of one electron to find the number of electrons.
01:33
Therefore the number of electrons that is n is equal to number of electrons n is equal to total charge divided by charge on one electron...