AC Power in Purely Inductive Circuits Quiz

In a purely inductive circuit, how does the voltage relate to the current?

• Voltage and current are in phase.

• Voltage leads the current by 90 degrees.

• Voltage lags the current by 90 degrees.

• Voltage and current are out of phase by 180 degrees.

What is the phase angle between voltage and current in a purely inductive circuit?

• 180 degrees

• 90 degrees

• 45 degrees

• 0 degrees

How is the average power in an AC inductive circuit calculated?

• By adding RMS voltage and RMS current.

• By multiplying peak voltage and peak current.

• By multiplying RMS voltage, RMS current, and the sine of the phase angle.

• By multiplying RMS voltage, RMS current, and the cosine of the phase angle.

What is the average power in a purely inductive circuit?

• Equal to the product of voltage and current.

• Equal to the RMS power.

• Zero watts.

• Equal to the peak power.

During which part of the cycle is power positive in an inductive circuit?

• When both voltage and current are negative.

• When voltage is negative and current is positive.

• When both voltage and current are positive.

• When voltage is positive and current is negative.

What does negative power indicate in an inductive circuit?

• Power is being consumed by the circuit.

• Power is flowing from the source to the load.

• Power is flowing from the load back to the source.

• Power is being stored in the circuit.

What happens to the power flow when it is negative in an inductive circuit?

• It flows from the source to the load.

• It flows from the load back to the source.

• It is dissipated as heat.

• It is stored in the circuit.

What is the phase angle in a capacitive circuit?

• 45 degrees

• 90 degrees, with voltage leading current

• 0 degrees

• 90 degrees, with current leading voltage

In a resistive circuit, what is the phase angle between voltage and current?

• 90 degrees

• 180 degrees

• 0 degrees

• 45 degrees

What mnemonic device is used to remember the characteristics of inductive circuits?

• LE from LE the Iceman

• RC from RC the Racer

• RL from RL the Leader

• LC from LC the Charger