1. Electricity The phenomenon of the flow of electric charge through a conducting medium. There are 2 types of charge, Positive and Negative. Electric charge will flow from high potential to lower potential.
2. DC and AC Electrical Power DC = Direct current is a current of electric charge that flows with a fixed value and direction, stored in a media like battery. used on all small electronic devices or gadgets. AC = Alternating current is a current of electric charge that flows with a direction and quantity that periodically changes, generated from an electric alternator. used in large electronic devices such as refrigerators, ovens, water pumps, vacuum cleaners, etc.
3. Some of the variables that appear in this phenomenon Current (I) : The electric charge that flows on the conductor media in Amperes is measured by an Ammeter Voltage (V) : The potential difference between the two poles, positive and negative, in Volts is measured with a Voltmeter Resistant(R) : A load that slows the flow of electricity to be converted into other forms, light, sound, mechanical motion etc. Written in Ohms and measured with an Ohmmeter
4. From the above variables, the main formula for electricity is : I = V / R Written In the Units: Ampere = Volt / Ohm Power(P) : The rate of electrical energy that flows in a conductor and is measured in Watts P = V * I Written In the Units: Watt = Volt * Ampere 5. Electrical Energy The result of the conversion of electrical power into other forms of energy that can be used to illuminate, heat, move, and is measured in joules or kilowatt-hours (kWh) kWh = P / 1000 * Time (Hours) kWh = Watt / 1000 * Time (Hours) 6. Electricity Cost/Bill = kWh * Tariff This electricity cost is calculated per unit kWh Example: Air conditioner 360 watts live within 1 hour 30 minutes per day, electricity tariff 2.18 USD Electricity Cost = 360 / 1000 * 1.5 * 2.18 Electricity Cost = 1.18 USD If this Air Conditioner live everyday in a month, then: Electricity Cost = 1.18 * 30
