An AC voltage is applied to a resistor R and an inductor L in series. If R and inductive reactance X(L) are both 3 Ω, determine the phase difference between applied voltage and current.
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An AC voltage is applied to a resistor R and an inductor L in series. If R and inductive reactance X(L) are both 3 Ω, determine the phase difference between applied voltage and current.

G1 Physics · Accepted Answer

Step 1: In a series RL circuit the voltage across the resistance is in phase with I, whereas the inductive voltage leads I by 90°. Step 2: The resultant applied voltage leads current by φ with tanφ=X(L)/R. Step 3: Given X(L)=R=3Ω, φ=arctan1=45°=π/4. Choose A. Final answer: (A), refer to source diagram / graph.