A 20-Ω resistor, 50-µF capacitor, and 30-mH inductor are connected in series with an ac source of amplitude 10 V and frequency 125 Hz.
What is the impedance of the circuit?
What is the amplitude of the current in the circuit?
What is the phase constant of the current?
How much energy is dissipated by the resistor in 2.5 s?
An alternating current generator is connected to a device whose internal circuits are not known. We only know current and voltage outside the device, as shown in the diagram. What is the power dissipated by the circuit?