Phasor Diagrams in Electrical Circuits

What do phasor diagrams represent in electrical circuits?

• The relationship between direct current (DC) waveforms

• The relationship between alternating current (AC) waveforms

• The relationship between resistance and capacitance

• The relationship between voltage and power

What types of AC circuits can phasor diagrams help to understand?

• Resistive, inductive, and capacitive

• Conductive, resistive, and magnetic

• Capacitive, magnetic, and conductive

• Inductive, magnetic, and conductive

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

• 0 degrees

• 90 degrees

• 180 degrees

• 270 degrees

What does the phasor diagram for a resistive circuit indicate about the voltage and current vectors?

• They point in the same direction

• They are perpendicular

• They point in opposite directions

• They are at 45 degrees to each other

In a resistive circuit, when do the waveforms of voltage and current peak?

• At the same time

• At different times

• Voltage peaks first

• Current peaks first

In an inductive circuit, by how many degrees does the current lag behind the voltage?

• 45 degrees

• 90 degrees

• 180 degrees

• 270 degrees

What does the phasor diagram for an inductive circuit show?

• Voltage vector leading current vector by a quarter cycle

• Current vector leading voltage vector by a quarter cycle

• Current vector lagging behind voltage vector by a quarter cycle

• Voltage vector lagging behind current vector by a quarter cycle

What is the reason for the phase difference in an inductive circuit?

• Nature of capacitors

• Nature of resistors

• Nature of inductors

• Nature of transformers

In capacitive circuits, by how many degrees does the current lead the voltage?

• 90 degrees

• 45 degrees

• 180 degrees

• 60 degrees

What does the phasor diagram for a capacitive circuit depict?

• Current vector leading the voltage vector by a quarter cycle

• Voltage vector leading the current vector by a quarter cycle

• Current and voltage vectors in phase

• Voltage vector leading the current vector by half a cycle