The SI unit of electric charge is the coulomb (C). One coulomb is defined as the amount of charge transferred when a current of one ampere flows for one second. This relationship is expressed as:
Q=I×tQ = I \times t
where Q is charge (C), I is current (A), and t is time (seconds).
This equation shows that charge is directly proportional to current and time. For example, if a current of 2 A flows for 3 seconds, the total charge moved is:
Q=2×3=6CQ = 2 \times 3 = 6C
This concept is important in electrical circuits and helps understand the movement of electrons.