15. The armature winding of a 200-V, 4-pole, series motor is lap-connected. There
are 280 slots and each slot has 4 conductors. The current is 45 A and the flux per pole is 18 mWb.
The field resistance is 0.3 Ω; the armature resistance 0.5 Ω and the iron and friction losses total
800 W. The pulley diameter is 0.41 m. Find the pull in newton at the rim of the pulley.
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