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Electrostatic Potential And Capacitance

Question

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In an L-R circuit reactance and resistance are equal. Calculate phase by which voltage differ current?

Solution

Given, the reactance and resistance are equal for an L-R circuit.

Hence,
Phase difference between voltage and current is,

\tan ϕ = \frac{X_{L}}{R} \Rightarrow ϕ = 45 °

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