a) The resistivity of a metal alloy is 3.0 x 10 N.m. If a wire of diameter 1.0 mm and length50.0 m is constructed from this alloy, what is its electrical resistance? Will this resistance increase or decrease if the temperature of the wire increases? b) Calculate the four currents shown as blue arrows in the circuit below c) What power is transformed in each of the four resistors? d) An AC voltage with peak-to-peak amplitude of 240 V is applied to the input of a step-down transformer with three times as many windings on the input as on the output. What is the RMS output voltage?

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