Professional Courses
Industry-relevant training in Business, Technology, and Design to help professionals and graduates upskill for real-world careers.
Categories
Interactive Games
Fun, engaging games to boost memory, math fluency, typing speed, and English skills—perfect for learners of all ages.
Typing
Memory
Math
English Adventures
Knowledge
Enroll to start learning
You’ve not yet enrolled in this course. Please enroll for free to listen to audio lessons, classroom podcasts and take practice test.
Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is the formula for calculating power factor?
💡 Hint: Think about the phase relationship between current and voltage.
Question 2
Easy
What happens to power factor in a purely resistive circuit?
💡 Hint: Is there a phase difference in a resistive circuit?
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What does a power factor of 0 indicate in a circuit?
- Maximum power consumption
- No real power consumption
- Efficient power usage
💡 Hint: Consider what happens when currents and voltages are 90 degrees out of phase.
Question 2
True or False: At resonance, power factor is always 0.
- True
- False
💡 Hint: Think about what resonance means in terms of power transfer.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
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.
💡 Hint: First, solve for the reactances, then adjust for resonance.
Question 2
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.
💡 Hint: Use trigonometric identities to assist in determining the power factor.
Challenge and get performance evaluation