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Current Produced by Motional EMF b • Motional EMF: E = vBL • Terminal voltage: Vab = E − Ir E • Electric current: E − Ir − IR = 0 ⇒ I = r+R ~app • Applied mechanical force: F B L I ~B = I L ~ ×B ~ • Magnetic force: F Fapp FB a v ~app = −F ~B • Motion at constant velocity: F b • Electrical power generated: Pgen = EI I r • Mechanical power input: Pin = F v = (ILB)v = (vBL)I = EI R ε • Electrical power output: Pout = Vab I = EI − I 2 r a tsl247 – p.1/1
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