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The heat power produced at the contact of a thermoelectric generator is proportional to the current 1: dW = (11A - 118). It) dt = where II, and II, are the Peltier coefficients of the materials A and B. The current is given by V 18) - (x - 1) e (t where X is a constant, V is voltage and R is the resistance. a) Derive the energy generated at the contact