In the circuit of Fig. 11.4, calculate the average power absorbed by the resistor and inductor. Find the average power supplied by the voltage source. 30

3 Determine the rms value for the waveform in Fig. 11.64. i(t) 5 0123 34 56 78 9 10 t

Section 11.8 Power Factor Correction 11.69 Refer to the circuit shown in Fig. 11.88. (a) What is the power factor? (b) What is the average power dissipated? (c) What is the value of the capacitance that will give a unity power factor when connected to the load? 120 V rms Z 10 +j122 60 Hz

Q2) A three phase load (motor) draws 30 kW when connected to 440 V rms, 50 Hz line if the power factor is 0.85 lagging, Determine: a) The line current drawn by the motor. b) The KVAR rating of the three capacitors - connected in parallel with the motor that will raise the power factor to 0.95 lagging, and c) The capacitance of each capacitor.