- #1
Rugile
- 79
- 1
Homework Statement
A voltage source is connected to a series LC circuit. The frequency of the source is resonant. The voltage amplitude of capacitor is 1V. Find the average power in the circuit.
Homework Equations
The Attempt at a Solution
I realize that if there is no active resistance the power is 0. I tried assuming that there is active resistance of the voltage source, but it leads me nowhere since there are so many unknowns left: [itex]I_{max} = \frac{U_{max}}{R}[/itex]
$$P=\frac{U_{max}I_{max} }{2}$$
$$U_{maxC} = \frac{I_{max}}{\omega C} = \frac{U_{max}}{R \omega C} = \frac{U_{max} \sqrt{LC}}{RC}$$
I really don't know how to work around this... Or should I just assume that there is no active resistance? Any help appreciated!