Chapter summary — Electricity

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CHAPTER 7ELECTRICITYCURRENTI = Q / tFlow of charge. Unit: ampere(A).OHM’S LAWV = I RAt constant temperature, V isproportional to I.RESISTANCER = ρL / ADepends on length, area andmaterial.POWERP = V IUnit: watt (W). Also P = I²R =V²/R.SERIESR = R₁ + R₂ + …Same current through eachresistor.PARALLEL1/R = 1/R₁ + 1/R₂ + …Same voltage across eachbranch.

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