8. A power supply provides 24.2 V to run a DC motor. When the motor is jammed so that the armature can't turn, the current drawn is 14.0 A. a) What is the resistance of the armature? d in the 2 marks b) When fully operating, the back EMF generated is 19.8 V. Determine the current flowing through the armature as it rotates. plied to the transformer 3 marks 9. Explain why a transformer is unable to induce an EMF voltage and current in a secondary circuit if its primary coil is connected to a DC (direct current) power supply such as a battery 2 marks Page 7 of 8