The circuit in Fig. 2.134 is to control the speed of a motor such that the motor draws currents 5 A, 3 A, and 1 A when the switch is at high, medium, and low positions, respectively. The motor can be modeled as a load resistance of 20 m Determine the series dropping resistances and R3 R .

Sample Notes EE 212 AC Steady State Power Different types of AC power 1. Instantaneous Power [Watts] 2. Average Power (Active Power, Real Power) [Watts] 3. Reactive Power (Imaginary Power) [VAR] 4. Complex Power [VA] 5. Apparent Power [VA] 6. Power Factor Instantaneous Power p(t) [Watts] p(t) = v(t) i(t); t = time 1. If current i(t) is entering the device then p(t) is positive and the device is absorbing power 2. If current i(t) is leaving the device then p(t) is negative and the device is supplying power