Question

a current of 3A flows past a particular point in a circuit. calculate the charge that passes through if the time that the current flows for is 1 hour

Answer 1

Explanations & Calculations

• This is about using the equation $\small Q=it$ which gives the charge carried by a current during a period of time.
• Time should be in seconds so 1 hour needs to be converted into seconds.

$\qquad\qquad \begin{aligned} \small 1h&=\small 1\times60\times60s\\ &=\small 3600\,s \end{aligned}$

• When the current is in Amperes and the time is in seconds, the charge is given in coulombs.
• You can easily give it a try now using that equation.
• Ampere seconds is Coulombs or $\small 1As =1C$