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Question
An ac circuit as shown in the figure has an inductor of inductance L and a resistor of resistance R connected in series. Using the phasor diagram, explain why the voltage in the circuit will lead the current in phase.
Solution
Phasor Diagram of the above circuit will be:
Net voltage `= sqrt("V"_2^2 + "V"_"R"^2)` will ahead of current by Φ
`tan phi = "V"_2/("V"_"R")`
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