The ideal meters shown read rms current and voltage.The average power delivered to the load is:
A)definitely not equal to VI
B)perhaps more than VI
C)possibly equal to VI even if the load contains an inductor and a capacitor
D)definitely less than VI
E)zero as is the average of any sine wave

Question

The ideal meters shown read rms current and voltage.The average power delivered to the load is: 
A)definitely not equal to VI 
B)perhaps more than VI 
C)possibly equal to VI even if the load contains an inductor and a capacitor 
D)definitely less than VI 
E)zero as is the average of any sine wave

Quizplus · Accepted Answer

The average power delivered to the load can be expressed as P = VI cos(phi), where phi is the phase angle between the voltage and current waveforms. Even if the load contains an inductor and a capacitor, the power factor can still be 1 (i.e. cos(phi) = 1), resulting in P = VI. Therefore, option C is a possible choice.

The Ideal Meters Shown Read Rms Current and Voltage