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A 750V DC shunt motor takes 100A and runs at 3000rpm at full load. The armature...

A 750V DC shunt motor takes 100A and runs at 3000rpm at full load. The armature resistance is 1 ohm and the field winding resistance is 200 ohm. Assume magnetic linearity and flux is directly proportional to the field current.

Compute its new speed if the developed torque remains the same after adjusting the field winding resistance to 250 ohm.
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