Electric Current Electric current is the time rate of change of charge, measured in amperes (A). Mathematically, the relationship between current i, charge q, and time t is i=dq/dt Basic Concept Consider

Electric Charge Electric charge is a property which determines the electromagnetic interaction of subatomic particles, denoted by (q), measured in coulombs (C). Subatomic Particles Subatomic particles

Electric Circuit : An electric circuit is an interconnection of electrical elements. A simple electric circuit is shown in following figure. It consists of four elements: a battery, a lightbulb, a switch