In a series RLC circuit at resonance, what is the phase difference between the total voltage and the current?
Answer and explanation
Correct answer: B.
- Step 1: At electrical resonance, inductive reactance equals capacitive reactance: .
- Step 2: The total circuit impedance equals pure resistance: , with net reactance .
- Step 3: Since the reactive components cancel, voltage and current are in phase, giving a phase angle .
Answer
0^\circ.
Why not the others: '' occurs in a purely inductive or purely capacitive circuit; '' represents complete phase opposition; '' occurs when reactance equals resistance ().
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