So, if we use this equation in the above Power Formula, we getĭepending on the available quantities, you can use one of the three power formulas for calculating DC Power. According to Ohm’s Law, the voltage in a circuit (or component) is a product of the resistance and the current. We can derive further Power formulas by applying Ohm’s Law. Power in resistive DC Circuits is just the product of voltage and current. In simple DC Circuits i.e., electric circuits with DC power supply, the power formula is given below: Let us now see different electric power formulas in both DC and AC Circuits. Electric Power Formula in AC & DC Circuitsĭepending on the type of current in the circuit i.e., Alternating Current or Direct Current, the Electric Power can be further classified into AC Power and DC Power. The first term (W/Q) represents the electric potential (V) while the second term (Q/t) represents the current (I). Using the above statement, we can rewrite the previous power equation as: We know that the Electric Potential is the amount of Work done in moving a unit charge and current is the rate of movement of charge. So, if P is the Power, W is the Work and t is the time, then In terms of Physics, Energy is the ability to do Work and the rate of doing that Work is known as Power. Our utility company supplies this electrical energy in the form of electric potential and current and the rate at which electrical energy transfers in an electrical circuit is known as Electrical Power. Electric Power Formula in AC & DC CircuitsĮlectrical Energy is one of the widely used forms of energy in our day to day lives whether it is in the form of AC Mains power or batteries.
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