In the circuit shown below vg 44cos106t in Volts and Ro 65

In the circuit shown below, vg = 44cos106t (in Volts), and Ro = 65 ?. What is the average power (in Watts) supplied by the source? You should calculate the complex power as (1/2)*V*conjugate(I). The average power is then the real part of the complex power. Be careful to note that the question asks for the average power supplied. Express your answer to two decimal places.

Solution

average power = V²/ 2Ro

= 44² / 130

= 13.2 W

Complex power = V* I

= 314