![]() Given the current and the voltage of the source, all you need to do is multiply the values. You can also use it to calculate the power requirement of a component. ![]() If you have a power source, you can use this formula to calculate the actual power the source can generate.The following are some of the applications of the Watt’s law formula: However, you can also use an online Watt’s law calculator. You can carry out most calculations involving Watt’s formula manually. These formulas can also be used to derive several other formulas. Substituting these into Watt’s formula, we get: However, you can combine these laws to get useful formulas. People often ask what is the difference between Watt’s law and Ohm’s law? While Ohm’s law defines the relationship between resistance, voltage, and current in a circuit Watt’s law defines the relationship between power, voltage and current. The unit of power is joule per second (J/sec) also known as watts (W). Simply put, it is the amount of electrical energy transferred per unit time. Power (P) is a measure of the quantity of work a circuit can do, or a component can consume per unit time. This law states that the current passing through a conductor is directly proportional to its voltage, i.e., I=V/R Power Ohm’s law specifies the relationship between current, resistance, and voltage. It is a measure of an electrical component’s ability to resist the flow of electrical current. Resistance (R) is the opposition to the flow of current. Current can only flow when there is a difference in electrical potential. The current (I) is the amount of electric charge flowing through a point in a circuit at any given time. Any difference in electrical potential causes electrons to flow from a point of higher potential to a point of lower potential. please use regional emissions factors available in AVERT or eGRID.Voltage (V) is the electrical potential difference between two points in an electric circuit. Note that the calculator uses national average emissions factors for electricity, which may not be accurate for your region. For electricity consumption, the calculator uses an average emissions factor that includes both baseload and non-baseload generation. ![]() * The Equivalencies Calculator uses different emissions factors for electricity depending on whether it is avoided or consumed at typical scales, energy efficiency and renewable energy programs and projects do not affect baseload power generation, so the calculator uses a non-baseload emissions factor. For more accurate estimates, please use regional emissions factors available in AVERT or eGRID. Kilowatt-hours used Choose kilowatt-hours used when entering data on electricity use, such as your household’s or company’s annual electricity consumption. Kilowatt-hours avoided Choose kilowatt-hours avoided when entering data on electricity use avoided through energy efficiency or fossil fuel electricity generation avoided through renewable energy. To see the methodology used to determine annual greenhouse gas emissions per passenger vehicle, visit the Calculations & References page for equations and sources used. For the calculator’s purposes, passenger vehicles are defined as 2-axle 4-tire vehicles, including passenger cars, vans, pickup trucks, and sport/utility vehicles. Gasoline-powered passenger vehicles While passenger vehicles are not a unit of energy consumption, they do consume energy.
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