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Application of parallel resonance is
Tuned Tank Circuit
Q meter
Voltage Amplification
All of these
Tuned Tank Circuit
Parallel resonance, also known as anti-resonance, occurs in a circuit containing both an inductor and a capacitor in parallel when the reactive currents of the two branches cancel each other out. At this resonant frequency, the circuit offers maximum impedance to the source, resulting in minimum line current.
Parallel resonance, also known as anti-resonance, occurs in a circuit containing both an inductor and a capacitor in parallel when the reactive currents of the two branches cancel each other out. At this resonant frequency, the circuit offers maximum impedance to the source, resulting in minimum line current.
frтАЛ=2╧АLCтАЛ1тАЛ тАФ Resonant frequency of the tank circuit
ZmaxтАЛ=RCLтАЛ тАФ Dynamic impedance at resonance
In a parallel RLC circuit, resonance occurs when the inductive susceptance BLтАЛ=╧ЙL1тАЛ equals the capacitive susceptance BCтАЛ=╧ЙC. Because these components have opposite phase characteristics, the net reactive current becomes zero, leaving only the resistive component. This state creates a 'tank' circuit effect, where energy oscillates between the magnetic field of the inductor and the electric field of the capacitor with minimal external power draw.
At parallel resonance, the total circuit impedance is purely resistive and reaches its maximum value.
The circuit draws minimum current from the source at the resonant frequency.
The 'Tank Circuit' is widely used in RF oscillators and band-pass filters.
High impedance at resonant frequency
Effective for signal selection in radio tuning
Sensitive to variations in component values (Q-factor dependency)
Not suitable for high power transfer applications
Radio frequency (RF) tuning circuits
Oscillators in communication systems
Band-pass filter design
Option B (Q-meter) uses both series and parallel resonance properties but is a measuring instrument, not the application itself.
Option C (Voltage Amplification) is typically the primary characteristic of series resonance circuits (Magnification factor).
A is correct тАФ The parallel resonant circuit, commonly called a Tuned Tank Circuit, is designed to resonate at a specific frequency for filtering or oscillation.
Always remember: Series resonance leads to minimum impedance (current maximum), whereas parallel resonance leads to maximum impedance (current minimum).