power - Why can I use P = I²R but not P=V²/R when calculating …
This is the answer in the book: P = I²R * t = 3600 * 0.01 * 2 = 72 Joules You need to get a better book then because that is plainly wrong. Power does equal I²R but it doesn't equal I²R * t. …
Calculating the power lost per foot from “\$I^2R\$ losses"
Dec 30, 2020 · What you have done is applied 115 volts across the 1 foot of copper cable. This isn't what we are doing here. What you need to find is the amount of current through the cable, …
Why does reactive power lead to (I^2)R losses?
Jan 2, 2024 · I read that reducing the power factor increases the current required in the lines (to deliver the same amount of useful work) and therefore increases the (I^2)R losses. Shouldn't …
power - Why stepping up voltage during transmission considers …
Jun 11, 2017 · During the transmission, the generated electric power is delivered after stepping up to hundreds of thousands or even more voltages by transformers. In that case ...
The \\$I^2R\\$ loss in transformer is eddy current loss or copper …
Jul 29, 2015 · You are confusing copper losses and eddy current losses. Generally, in transformers, I2R loss is copper loss.
Transformer heat losses - Electrical Engineering Stack Exchange
May 28, 2021 · Eddy current loss is conductive I2R loss produced by circulating currents induced in response to AC flux linkage, flowing against the internal resistance of the core.
voltage - For power loss, P=I^2R, why can't I use I=V/R to find I …
Aug 9, 2019 · To calculate power loss using P=I^2R, we cannot use I=V/R, to find current and plug it into P=I^2R, instead we must use P=IV to find current, is there a reason why?
Power's relationship to Resistance - Electrical Engineering Stack …
Oct 6, 2015 · $$ \\frac{V^2}{R} = P = I^2 \\cdot R $$ According to this equation, Power is inversely proportional to resistance on the left side and directly proportional to resistance on the right …
Why we cannot use P=I2R to determine the current through the …
Jun 25, 2020 · Why we cannot use P=I2R to determine the current through the cable? The current flow through the cable is affected by the resistance of cable right? But when I use P = IV and …
voltage - Is power proportional to V or V^2? - Electrical …
Jan 20, 2021 · Yes, because I is a function of V, as long as we're talking about resistors. Power is linearly proportional to voltage, though, if you're talking about a constant current device.