A 3-phase, 440-V, 50-Hz motor delivers an output power of 40 kW. The efficiency and power factor of the motor for the above operating condition are 88% and 0.80 (lagging), respectively. (a) Determine the complex power drawn by the motor and draw the power triangle. (b) A 3-phase capacitor bank is added at the motor terminals to improve the power factor to 0.95 lagging. Determine the kVAr rating of the capacitor bank. What would be the capacitance per phase if the capacitor bank is (i) A-connected (ii) Y-connected? (c) If the motor is supplied through a cable having an impedance of (0.1+j0.3) /phase, determine the cable copper loss and voltage at sending-end of the cable before and after adding the capacitor bank. Assume that the motor terminal voltage remains constant at 440 V. [(a) (45.45+j34.1) kVA; (b) 19.2 kVAr, 105.2 µF, 315.8 µF; (c) 1.67 kW, 473.6 V, 1.18 kW, 461.2 V]

what is the statement of Lenz law.

Hello, I have a question for my material science question I am having trouble answering. The question is listed down below. Thanks. Aluminum’s electrical conductivity should make it a candidate for wiring in electronic equipment. What is a limiting factor in its use as wiring?

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