Q/ A d.c. series motor takes 38 A at 240 V and runs at 940 r.p.m. If the armature and field resistance are 0.21 Q and 0.11 Q respectively and the iron and friction losses are 0.52 kW, find (1) The...


Q/ A d.c. series motor takes 38 A<br>at 240 V and runs at 940 r.p.m. If<br>the armature and field resistance<br>are 0.21 Q and 0.11 Q respectively<br>and the iron and friction losses<br>are 0.52 kW, find (1) The back<br>e.m.f (2) the torque developed in<br>the armature if the motor speed is<br>halved . (3) The motor efficiency<br>p 9:12<br>

Extracted text: Q/ A d.c. series motor takes 38 A at 240 V and runs at 940 r.p.m. If the armature and field resistance are 0.21 Q and 0.11 Q respectively and the iron and friction losses are 0.52 kW, find (1) The back e.m.f (2) the torque developed in the armature if the motor speed is halved . (3) The motor efficiency p 9:12

Jun 11, 2022
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