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Series Resonant Circuit #8211; (i) X<sub>L</sub> = X<sub>C</sub> ⇒ Z<sub>min</sub> = R, i.e. circuit behaves as resistive circuit. (ii) V<sub>L</sub> = V<sub>C</sub> ⇒ V = V<sub>R</sub>, i.e. whole applied voltage appeared across the resistance. (iii) Phase difference, Փ = 0° ⇒ Power Factor = cosՓ = 1 (iv) Power consumption, P = V<sub>rms</sub> I<sub>rms</sub> = 1/2V<sub>0</sub>I<sub>0</sub> (v) Current amplitude in the circuit is maximum and it is given by, I<sub>0</sub> = V<sub>0</sub>/R (vi) This circuit is used for voltage amplification and as selector circuits in wireless telegraphy.
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