9.4 - Behavior of AC in a Resistor, Inductor, and Capacitor
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
What is the formula for calculating RMS current through a resistor?
💡 Hint: Think about Ohm’s Law.
In what phase relationship does AC current in a resistor operate?
💡 Hint: Recall the definition of being in phase.
4 more questions available
Interactive Quizzes
Quick quizzes to reinforce your learning
What formula represents the RMS current in a resistor?
💡 Hint: Consider how voltage, current, and resistance are interrelated.
True or False: In AC, current lags voltage by 90 degrees in a capacitor.
💡 Hint: Think about the phase differences in AC circuits.
1 more question available
Challenge Problems
Push your limits with advanced challenges
You have a circuit with a resistor (120Ω), an inductor (0.5H), and a capacitor (50μF) all in series. If the AC source operates at 60Hz, calculate the overall impedance and the RMS current supplied by a 240V source.
💡 Hint: Keep in mind to analyze the phase relationships before calculation.
A circuit consists of a 100Ω resistor and a capacitor (C) in series with an AC source of 50Hz. If the current lags the voltage by 45 degrees, determine the required capacitive reactance.
💡 Hint: Sketch the phase angle to visualize.
Get performance evaluation
Reference links
Supplementary resources to enhance your learning experience.