CH 30 : Electrifying!Problem of the DayDaily WritingReviewAC/DCSeries vs. ParallelSeries vs. Parallel (cont.)Playing It Safe!Thinkof all of the electronic devices that you use every day and how many hours you spend using them every day. Is this good or bad? Explain knihKevin Branch, David Delgado, and Matthew VincentProblem of the DayA blow dryer with a power rating of 1000W uses 1.75 kW x h in one week. How many hours or minutes is the dryer used daily on average?Answer:75kWh / 1kW = 1.75hours = 1h 45min in a week /7 = 15 min per dayDaily WritingThink of all of the electronic devices that you use every day and how many hours a day do you spend on them? Is this good or bad? Explain.ReviewChapter 27 : Riding The WavesElectromagnetic Radiation ○Waves of energyWavelength○The length of one complete waveFrequency○The number of waves per secondAs wavelength decreases, frequency increasesAC/DCAC = Alternating CurrentCurrent available from the powerdistribution gridDC = Direct CurrentCurrent in a battery-powered circuitAC adaptersConvert AC current to DCUsed in most electronic devicescomewemakeourcountry.blogspot.comoutpost1.stellimare.comSeries vs. ParallelSeries circuitA circuit in which resistors (ex. Lights) are arranged one right after the other in a chainTo find the Total Resistance in a series circuit you must add the values of the individual resistors.ftschool.orgSeries vs. Parallel (cont.)Parallel circuitA circuit in which the current branches on the way to each resistor then comes back together after it has passed through the resistorsTo find the Total Resistance in a parallel circuit we have to add the reciprocal value of each resistor (ex. 1/x)shop4joy.comPlaying It Safe!Rule 1: Don’t become part of the circuit!Short circuit – an accidental lower-resistance connection that bypasses the load of resistance of the circuitCircuit breaker – detects when current is increasing quickly due to a short, and it opens the circuitRule 2: Use a ground!Ground wire – connects any metal in an electrical appliance to the EarthRule 3: Turn off the
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