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A 240 V, dc shunt motor draws 15 A while supplying the rated load at a speed of 80 rad/s. The armature resistance is 0.5 Ω and the field winding resistance is 80 Ω. The external resistance to be added in the armature circuit to limit the armature current to 125% of its rated value is
31.9 Ω
31.1 Ω
15.9 Ω
15.1 Ω
31.1 Ω
Quick Summary: Practice and solve "A 240 V, dc shunt motor draws 15 A while supplying the rated load at a speed of 80 rad/s. The armatu..." for Electrical - Electric Drives. The correct answer is Option B: 31.1 Ω. Detailed step-by-step solution, conceptual clarity, and formulas on Examoogle.
Answer:
Option **(b) **