- The various electrical formulas and their derivations are as follows: The relationship between volt, watt, and ohms is below. Volts = square root of (watts × ohms) The relationship between volts, watts, and amperes is as follows. Volts = watts/ amperes.
- Annual energy consumed by a light bulb is calculated by multiplying the power (43 watts) by the average daily use (3 hours/day) by the number of days per year (365). Assuming an average daily use of 3 hours per day, an incandescent bulb consumes 47.1 kWh per year, and an LED bulb consumes 9.9 kWh per year (EPA 2016).
- Power Losses due to the transmission of current can be significantly lowered with the improvement of Power Factor. This benefit is mainly realized where there are long conductor runs to motors or electrical distribution systems are heavily loaded. Known as I 2 R losses, the formula for calculating the reduction of these losses is shown as follows:
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