At resonance, the phase angle for RLC series resonance circuit equals:
Correct answer: A. 0o
- A. 0o
- B. 90o
- C. 180o
- D. 270o
Explanation
This is the correct answer. At resonance in an RLC series circuit, the inductive reactance (XL) and capacitive reactance (XC) are equal in magnitude and cancel each other out. This results in a net impedance that is purely resistive, and there is no phase difference between the current and voltage. As a result, the phase angle is 0°, indicating that current and voltage are in phase.
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About Alternating Current
Alternating current varies periodically, so phase relationships become essential when current passes through a resistor, capacitor or inductor. The chapter distinguishes resistance from capacitive and inductive reactance, explains phase lead and lag, and connects changing electric and magnetic fields with the production and properties of electromagnetic waves.
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