First slide

Phasors and Phasor Diagrams

Question

In an AC circuit, the reactance of a coil is $\sqrt{3}$ times its resistance. The phase difference between the voltage across the coil to the current through the coil will be

Easy

A

$π / 3$
B

$π / 2$
C

$π / 4$
D

$π / 6$

Solution

$tanϕ = \frac{X}{R} = \frac{\sqrt{3} R}{R} = \sqrt{3} \Rightarrow ϕ = 60^{\circ} = π / 3$

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