Question

Draw & Describe the phase relation between current and voltage in RL circuit?​

Answer 1

Answer:

where θ is the phase angle (in degrees) between voltage and current, X = 2πfL is the inductive reactance of the inductor, and R is the resistance of the resistor (both measured in ohms), and L is the inductance of the inductor (in Henries).

Note that when X = 0, then θ = arctan (0) = 0, which is as expected with a purely resistive circuit. Similarly, when R = 0, then θ = arctan (∞) = 90°, which is as expected with a purely inductive circuit. When R = X, then θ = arctan (1) = 45°, which is as expected with an RL circuit with equal values of resistance and inductive reactance.

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