Given below are two statements: Statement I : When the frequency of an AC source in a series LCR circuit increases, the current in the circuit first increases, attains a maximum value and then decreases. Statement II

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Correct answer: C. Both Statement I and Statement II are true

When an a.c. voltage is applied in a series LCR circuit, the current is increased first, attains a maximum and then decreases.

The formula to calculate the power factor is given by

$cosϕ = \dfrac{R}{\sqrt{{R}^{2} + \left({{X}_{L}}^{2} - {{X}_{C}}^{2}\right)}} . . . \left(1\right)$

At resonance, ${X}_{L} = {X}_{C}$ , Hence,

$cos{ϕ}_{resonance} = 1$

Thus, both the statements are true.

Given below are two statements: Statement I : When the frequency of...

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