 
 <prompt> How dem dey use di motors? Given di last question, write one context wey get di answer. E fit be 1 - 20 sentences. Context: <response>: Operating for normal power line frequencies, universal motors dey often dey found for range wey dey less than 1000 watts. Universal motors also dey form the basis of the traditional railway traction motor for electric railways. For this application, the use of AC to power motor wey originally dey designed to run on DC go fit lead to efficiency losses sake of eddy current heating of their magnetic components, especially the motor field pole-pieces wey, for DC, for don use solid (un-laminated) iron and dem dey rarely use am now. 