13). A motor with power factor of 0.85 is served by a single- phase 120 V source; the motor requires 3000 W of input power to deliver 2500 W output power. a) What is the efficiency of the motor? b) What is the line current drawn by the motor? p. 1

You have a 150 [kW] DC motor with an efficiency of 92% operating at full-load. The losses in the DC motor are:

A noninductive heater element with a resistance of 5 2 is connected across a 60 Hz source. The supply has a sine wave voltage with an instantaneous maximum value of 141.4 V. a. Determine the power in watts taken by the heater unit. b. What is the energy, in kilowatt-hours, taken by the heater unit in one month if it is operated 5 hours per day for a period of 20 days?

Machine problem