Loading the lesson
Loading the lesson
Search AllRounder.ai
Search the courses, subjects, tracks, games and features, or jump straight to a page.
Search the courses, subjects, tracks, games and features, or jump straight to a page.
3 cards from this section. Quick, good the night before a test.
What is the formula for calculating power factor?
Think about the phase relationship between current and voltage.
What happens to power factor in a purely resistive circuit?
Is there a phase difference in a resistive circuit?
What does a power factor of 0 indicate in a circuit?
Consider what happens when currents and voltages are 90 degrees out of phase.
True or False: At resonance, power factor is always 0.
Think about what resonance means in terms of power transfer.
In an LCR series circuit with R = 50 Ω, L = 200 mH, and C = 100 μF, find the resonant frequency and the average power for a supplied RMS voltage of 240V.
First, solve for the reactances, then adjust for resonance.
Calculate the power factor and average power for an AC circuit where the voltage is 400 V RMS, current is 12 A RMS, and the phase angle is 30 degrees.
Use trigonometric identities to assist in determining the power factor.
5 more questions in this section. Enroll free to practise them all.
Enroll free