Question

a) How much current does your laptop consume if 100 C of charge is transferred through the charger wire in 4 seconds? 

b) How much time is required for a 20 Coulombs charge to flow through a point if the current is 2 amperes? 

Answer 1

$Part\>a) \\\\\\ \textcolor{blue}{\Iota=\frac{Q}{t}}$ Where:

$\Iota$ = current

$Q$ = Charge

$t$ = time

$\therefore\>\Iota=\frac{100}{4}=25\>A$

Part b)

$\textcolor{blue}{t=\frac{Q}{\Iota}}$

$t=\frac{20}{2}=10\>second$