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Question: a dc series motor 230 v 12 hp 1200 rpm...

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A dc series motor (230 V, 12 hp, 1200 rpm) is connected to a 230 V supply, draws a current of 40 amperes, and rotates at 1200 rpm. Ra = 0.25 Ω and R 0.1 2. Assume magnetic linearity. (a) Determine the power and torque developed by the motor. (b) Determine the speed, torque, and power if the motor draws 20 amperes.

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