AC Circuits Quiz

What does AC stand for in AC circuits?

• Alternating Current
• Active Current
• Amplified Current
• Absolute Current

What is the unit of frequency in AC circuits?

• Volts
• Ohms
• Hertz
• Amperes

In a purely resistive AC circuit, how do voltage and current relate?

• Current lags voltage by 90 degrees
• Voltage lags current by 90 degrees
• Voltage and current are in phase
• Voltage and current are out of phase

In a purely inductive AC circuit, by how many degrees does the current lag the voltage?

• 0 degrees
• 45 degrees
• 90 degrees
• 180 degrees

In a purely capacitive AC circuit, by how many degrees does the current lead the voltage?

• 0 degrees
• 45 degrees
• 90 degrees
• 180 degrees

What does a phasor diagram represent in AC circuits?

• Only voltage
• Only current
• The relationship between voltage and current
• The power factor

What is the unit of inductive reactance?

• Amperes
• Volts
• Ohms
• Hertz

How does a capacitor store energy?

• In a magnetic field
• In an electric field
• In a chemical form
• In a mechanical form

In an RLC circuit, if the inductive reactance (XL) is greater than the capacitive reactance (XC), the current will:

• Lead the voltage
• Lag the voltage
• Be in phase with the voltage
• Be zero