Question: 2 5 0 V , D . C series motor has armature and field resistances of 0 . 3 ohmand 0 . 5 Omega

250V, D.C series motor has armature and field resistances of 0.3 ohmand 0.5\Omega respectively. Its full load current and speed are 10 A and 1500 r.p.m respectively. If the torque is reduce to 50%. Determine the current and speed. Assume the flux produced is proportional to the current

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