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3 cards from this section. Quick, good the night before a test.
What is the formula for impedance in AC circuits?
Think of it as a combination of resistance and reactance!
If R = 3 ohms, X_L = 4 ohms, and X_C = 1 ohm, what is the impedance?
Remember to plug the values into the impedance formula.
What does impedance (Z) combine?
Consider the components present in AC circuits.
True or False: In a purely capacitive circuit, the current lags the voltage.
Think about the behavior of current and voltage in capacitive components.
An LCR circuit has L = 20 mH, C = 50 µF. Calculate the resonant frequency and the impedance at this frequency if R = 10 ohms.
Use the resonance formula first, then ignore reactance at resonance.
What current flows through a circuit with R = 15 ohms, X_L = 25 ohms, X_C = 10 ohms, and voltage of 90V?
Include reactance into the impedance calculation step.
6 more questions in this section. Enroll free to practise them all.
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