Question

I got first part correct but dont know how to solve the other 2 problems

Answer 1

To determine the amount of electrons in a given charge we need to remember that the charge of an electros is:

$e=-1.602\times10^{-19}$

coulombs.

Now, if we have a given amount of charge an we want to know how many electrons are in the charge we divide it by the charge in the electron. In this case we have:

$\frac{-1650\times10^{-9}}{-1.602\times10^{-19}}=1.03\times10^{13}$

Therefore we have:

$1.03\times10^{13}\text{ electrons }$

We know that for each step the worker collects -50nC, this is the same as collecting:

$\frac{-50\times10^{-9}}{-1.602\times10^{\cdot19}}=3.12\times10^{11}\text{electrons}$

electrons. Now, that we know this we divide the maximum amount of charge the component can take by the electrons in each step:

$\frac{10^{12}}{3.12\times10^{-11}}=3.2$

Threfore the worker can take 3 complete steps before touching the component