Question about how to calculate power dissipated in an AC circuit with only AC voltages and resistors!

Question

anonymous · Answer

Three 100 Hz sinusoidal AC voltage sources are connected in series. Expressions for voltage sources are: 

V1 = 2.5 sin (wt)
V2 = 4.2 sin (wt + 30degrees)
V3 = 5.1 sin (wt - 45degrees)

Express V1, V2, and V3 as phasors in polar form using rms values.

Write the time-domain sinusoidal expression for the circuit current.

What is the total power dissipation in the circuit?

anonymous · Answer

|dw:1393432801759:dw|