The power formula is a fundamental equation used to calculate the amount of work done per unit of time. Learn more about the power formula and its calculations etc Here we Learn about Power in Physics and Electricity (Electric Power) with Definition, Unit, Formula , Calculation and Examples. Learn how to calculate power as the rate of energy transfer or work done with respect to time. Find out the definitions, formulas, units, and examples of average and instantaneous power , power efficiency, and power in machines. Learn the Power Formula We’ve seen the formula for determining the power in an electric circuit: by multiplying the voltage in “volts” by the current in “amps” we arrive at an answer in “watts.” Let’s apply this to a circuit example: How to Use Ohm’s Law to Determine Current In the above circuit, we know we have a battery voltage of 18 volts and a lamp resistance of 3 Ω. Using Ohm’s Law to determine current, we get: Now that we know the current, we can take that value ...
