Asked Jan 28, 2019

if during a period of 5 seconds, 10^17 electrons travel to the right past a given point in a copper wire, what is the current in the wire in amperes and in which direction is the current flowing.

check_circleExpert Solution
Step 1

Given:     number of electrons(n) = 1017

                                                time(t)  = 5 seconds

Find:                             Current(I) 



Step 2

use the formula:

I = Q/t

where,   I = current in ampere

                  Q = charge in coulomb

                  t =  time in seconds

"current is measured by charge flowing per second".

Step 3

we also know that,     Total charge (Q) = n×q

                            where,                    n = number of electrons


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