The phase angle of a series RLC circuit at resonance is:
Correct answer: C. 0o
- A. 180o
- B. 90o
- C. 0o
- D. None of these
Explanation
This is the correct answer. At resonance in a series RLC circuit, the phase angle between the current and voltage is 0 degrees. This means that the current is in phase with the voltage, and they reach their maximum and minimum values simultaneously.
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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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