The rated operating voltage and current of a permanent magnet DC motor are 48V and 2 amperes,
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- The rated operating voltage and current of a permanent magnet DC motor are 48V and 2 amperes, respectively. Its nominal speed is 1400 rpm. The motor's friction losses are 0.0385 Nm, and it has an efficiency of 90%. Accordingly, calculate the motor's: a) back electromotive force (Ke), and b) armature resistance (R).
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