Question 5: Which of the following statements is/are true? (multiple-choice, 15 points) (a) In a three-phase balanced system, the instantaneous real power is equal to its active power. (b) Impedance

can be expressed by phasor. (c) In a four-wire three-phase Wye connected loads, the phases do not affect one another.(d) The watt meter provides a measurement of the average power (d) The wattmeter provides a measurement of the average power.