Electricity is a form of energy produced by the movement of electric charges. Electric current is the rate of flow of charge in a conductor and is measured in ampere. The potential difference is the work done to move a charge between two points and is measured in volts. Ohm’s Law states that current is directly proportional to voltage at constant temperature. Resistance opposes the flow of current and depends on length, area, and material. Electric power shows the rate of energy consumption. Electricity is widely used in daily life.