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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is the formula for impedance in AC circuits?
π‘ Hint: Think of it as a combination of resistance and reactance!
Question 2
Easy
If R = 3 ohms, X_L = 4 ohms, and X_C = 1 ohm, what is the impedance?
π‘ Hint: Remember to plug the values into the impedance formula.
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 impedance (Z) combine?
- Resistance and capacitance
- Resistance and inductance
- Resistance
- capacitance
- and reactance
π‘ Hint: Consider the components present in AC circuits.
Question 2
True or False: In a purely capacitive circuit, the current lags the voltage.
- True
- False
π‘ Hint: Think about the behavior of current and voltage in capacitive components.
Solve 2 more questions and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
An LCR circuit has L = 20 mH, C = 50 Β΅F. Calculate the resonant frequency and the impedance at this frequency if R = 10 ohms.
π‘ Hint: Use the resonance formula first, then ignore reactance at resonance.
Question 2
What current flows through a circuit with R = 15 ohms, X_L = 25 ohms, X_C = 10 ohms, and voltage of 90V?
π‘ Hint: Include reactance into the impedance calculation step.
Challenge and get performance evaluation