what is electric current?
Answers
An electric current is a flow of electric charge. In electric circuits this charge is often carried by electrons moving through a wire. It can also be carried by ions in an electrolyte, or by both ions and electrons such as in an ionized gas. ... Electric current is measured using a device called an ammeter. Wikipedia
DEFINATION:-electric current is defined as the time rate of change of charge passing through a specified area
the moving charge may be positive or negative;the area may be cross-sectional area of a wire or some other suitable spatial area where charge are in motion.
expressed mathematically as -
i=dq/dt
in this equation i denote the instantaneous electric current and q denote the net charge,which may be the positive as well as negative kind,that is,
q = N1p+N2e
where,
N1p = total positive charge,
N2e= total negative charge