Question

A total charge of 16μC passes through a cross-sectional area of a nichrome wire in 4 s. How many electrons pass through the cross-sectional area in 16 s?

Answer 1

First figure out how many micro coulombs of charge pass through the cross section of nichrome wire in one second.

Then look up in your text or Google search and find out how man electronis make up one Coulomb of charge, and remember that "micro" would be 10^-6 of that quantity.

Now compute the quantity of electronss for 16 seconds.