Question
A shunt motor is connected to a $110-V$ line. When the armature generates a back emf of $104 \mathrm{~V}$, the armature current is $15 \mathrm{~A}$. Compute the armature resistance.
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A shunt motor has armature resistance $0.20 \Omega$ and field resistance $150 \Omega$, and draws 30 A when connected to a 120-V supply line. Determine the field current, the armature current, the back emf, the mechanical power developed within the armature, and the electrical efficiency of the machine.
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