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23 Nov 2019
An electric motor draws a current of 2.5 A from a 15 V battery whenit runs at normal speed. If the motorâs armature is âjammedâ sothat it cannot rotate, the current suddenly rises to 10 A. What isthe back emf of the motor when running at normal speed?
An electric motor draws a current of 2.5 A from a 15 V battery whenit runs at normal speed. If the motorâs armature is âjammedâ sothat it cannot rotate, the current suddenly rises to 10 A. What isthe back emf of the motor when running at normal speed?