Basic Electrical Engineering (3110005)

Question-2b

BE | Semester-1 Winter-2019 | 11-01-2020

Q2) (b)

Compare series and parallel resonance in ac circuit.

Description	Series Resonance Circuit	Parallel Resonance Circuit
Impedance at resonance	MInimum $Z = R$	Maximum $Z = \frac{L}{RC}$
Current	Maximum $I = \frac{V}{R}$	Minimum $Z = \frac{V}{\frac{L}{RC}}$
Resonance Frequency	$f_{r} = \frac{1}{2 π \sqrt{LC}}$	$f_{r} = \frac{1}{2 π \sqrt{LC}}$
Power Factor	Unity	Unity
Q- Factor	$f_{r} = \frac{1}{R} \sqrt{\frac{L}{C}}$	$f_{r} = \frac{1}{R} \sqrt{\frac{L}{C}}$
It magnifies at resonance	Voltage	Current

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