Question

A circuit is constructed with an AC generator, a resistor,capacitor and inductor as shown. The generator voltage varies intime as ε =Va - Vb = εmsinωt, where εm = 120 V and ω = 247radians/second. The inductance L = 148 mH. The values for thecapacitance C and the resistance R are unkown. What is known isthat the current in the circuit leads the voltage across thegenerator by φ = 50 degrees and the average power delivered to thecircuit by the generator is Pavg = 91 W.



1)
What is Imax, the amplitude of the current oscillations in thecircuit?

A
2)
What is R, the value of the resistance of the circuit?

Ω
3)
What is C, the value of the capacitance of the circuit?

μF
4)
The value of ω is now changed, keeping all other circuit parametersconstant, until resonance is reached. How was ω changed?

ω was decreased
ω was increased

5)
What is the average power delivered to the circuit when it is inresonance?

W