eclecmecoreecsectantal errored medceddyeddy currenteddy current lossedgeedge couplededge effectedgewise bendedifedison effect richardson effectedison storage battery nickel iron batteryediteditingeditoredoedpeepromeeprom or e2 promeffeciencyeffectiveeffective acoustic centereffective antenna lengtheffective areaeffective currenteffective echoing area of targeteffective fieldeffective fluxeffective flux densityeffective forceeffective heighteffective intensityeffective isotropically radiated powereffective lineeffective loadeffective losseffective masseffective matcheffective networkeffective noiseeffective operationeffective particle velocity root mean square particle velocityeffective perceived noise decibeleffective poleeffective potential