Understanding AC Circuit Theory

What is the impedance of a series RLC circuit at resonance?

• Zero

• Equal to the resistance

• Infinite

• Equal to the inductive reactance

In an AC circuit, if the current leads the voltage by 90 degrees, what type of component is primarily present?

• Resistor

• Inductor

• Capacitor

• Transformer

What is the frequency of an AC waveform with a period of 0.02 seconds?

• 20 Hz

• 50 Hz

• 60 Hz

• 100 Hz

Which of the following is the correct expression for the resonant frequency of a series LC circuit?

What is the phase difference between voltage and current in a purely resistive AC circuit?

• 0 degrees

• 45 degrees

• 90 degrees

• 180 degrees

If the peak voltage of an AC signal is 325 V, what is the RMS voltage?

• 230 V

• 325 V

• 115 V

• 162.5 V