Exercise :1 Assume that the dc motor shown in Fig. 1 draws a current of 10 amperes from the line with a supply voltage of 100 volts. If the total mechanical loss (friction, windage, etc.) is 90 watts,...

Do first 3 parts (a, b and c)

Extracted text: Exercise :1 Assume that the dc motor shown in Fig. 1 draws a current of 10 amperes from the line with a supply voltage of 100 volts. If the total mechanical loss (friction, windage, etc.) is 90 watts, calculate the a) Armature current. b)Total losses. c) Motor input power. d) Motor output power. e) Efficiency. V=100V Ra-l OHM Rf= 100 Ohms Fig 1: A dc-circuit motor