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On the problem of physical electric power formula, because r = u / I, so u = RI, why P = RI * I = I & # r because P = UI On the problem of physical electric power formula, because r = u / I, u = RI Why is p = RI * I = I & # r because P = UI Why is p = u * (U / R) = u & # / r because P = UI How to put these formulas into the topic
U. The three physical quantities I and R are related, two of which are determined by the other. The correlation is r = u / I
No matter P is equal to UI, I ^ 2 * r, or u ^ 2 / R, two of the three physical quantities are used to represent electric power, which are equivalent
What do the letters w = uit, P = UI and R = u / I mean
(1) P = w / T: P is electrical work, W is electrical energy, t is time (2) w = uit: W is electrical energy, u is voltage, I is current, t is time (3) P = IU: P is electrical power, I is current, u is voltage (4) r = u / I: R is resistance, u is voltage, I is current
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