The basic point of ohms law is that resistance R is the relation between the current flowing through the circuit and the potential difference across the terminals. Where ‘I’ is the current flowing through that conductor, V is the potential difference measured across the conductor, R is the resistance of that conductor and their SI units are amperes, Volts and Ohms respectively. given below:Īccording to OHM’s Law, the electric current flowing through any conductor between any two points is directly proportional to the potential difference across those two points, that proportionality constant is resistance and the given equation is That whole convention was shown in the fig. Electric current is a scalar quantity though it has magnitude as well as the direction it does not follow the vector law of addition that’s why it is considered as the scalar.Īs we know current flow from the positive terminal to negative terminal by convention but in reality, there are electrons flowing from negative terminals to positive terminals which causes a current. Ammeter is the device used to measure electric current. I=Q/T, where Q is the amount of charge flowing through a circuit in time period T. Basically, we can say an electric Current is flow of charge in coulomb per second through any closed circuit. It is denoted by I and its SI unit is ampere. Electric current is basically caused by the flow of electrons or ions. Physics notes class 12: The flow of electric charge through an electric called an electric current. CBSE Physics Notes For Class 12 Current Electricity (Electric Current)

Cbse class 12 physics notes