Power Factor and Circuit Analysis Quiz

Power factor in an inductive circuit is:

• Lagging

• Leading

• Unity

• Zero

What happens to power factor when capacitors are added to an inductive load?

• It improves

• It decreases

• It becomes zero

• It becomes infinite

In a three-phase system, the phase difference between two consecutive phases is:

• 120 degrees

• 90 degrees

• 180 degrees

• 60 degrees

The total power in a balanced three-phase system is:

• P = √3 × VL × IL × cosϕ

• P = VL × IL × cosϕ

• P = √3 × V × I × sinϕ

• P = VL × IL × sinϕ

What type of connection is used in domestic three-phase systems?

• Star Connection

• Delta Connection

• Series Connection

• Parallel Connection

In a delta connection, the line voltage is:

• Equal to the phase voltage

• √3 times the phase voltage

• Half the phase voltage

• Zero

What is the symbol for a dependent voltage source?

• Diamond-shaped with polarity marks

• Circle with polarity marks

• Rectangle with polarity marks

• Square with polarity marks

In nodal analysis, what assumption is typically made about the reference node?

• Its voltage is zero

• It carries the highest current

• It has the highest voltage

• It has infinite resistance

What is the power consumed in a purely resistive circuit?

• Real power

• Reactive power

• Apparent power

• Zero

Which of the following components has its voltage leading the current in a purely capacitive circuit?

• Capacitor

• Inductor

• Resistor

• Voltage source