Basics of AC Circuits

What does AC stand for in electrical terms?

• Analog Current

• Active Current

• Alternating Charge

• Alternating Current

What is the primary difference between AC and DC?

• AC can only be generated by batteries.

• DC is used in household appliances, while AC is not.

• AC is more efficient than DC.

• AC changes direction periodically; DC flows in one direction.

In an AC circuit, what is the term for the maximum voltage?

• Peak voltage

• RMS voltage

• Impedance voltage

• Average voltage

What is the unit of frequency in an AC circuit?

• Volts (V)

• Ohms (Ω)

• Amperes (A)

• Hertz (Hz)

What is the typical frequency of AC in household outlets in the US?

• 60 Hz

• 100 Hz

• 50 Hz

• 75 Hz

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

• 90 degrees

• 180 degrees

• 270 degrees

• 0 degrees

What component is used to store energy in an AC circuit?

• Resistor

• Capacitor

• Inductor

• Transformer

What is the effect of inductance in an AC circuit?

• Inductance increases the overall resistance in an AC circuit.

• Inductance causes current to lag behind voltage in an AC circuit.

• Inductance has no effect on the phase relationship in an AC circuit.

• Inductance causes voltage to lag behind current in an AC circuit.

What is the purpose of a transformer in an AC circuit?

• To store electrical energy for later use.

• To increase the frequency of AC current.

• To convert AC to DC current.

• To change the voltage level of AC current.

How does impedance differ from resistance in an AC circuit?

• Impedance differs from resistance in that it includes both resistance and reactance, and varies with frequency in AC circuits.

• Impedance does not change with frequency in AC circuits.

• Impedance is the same as resistance in AC circuits.

• Resistance is only relevant in DC circuits, while impedance applies to both AC and DC.