Application of parallel resonance is

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Tuned Tank Circuit

Explanation: The correct answer is A, Tuned Tank Circuit, which is a type of parallel resonance circuit used for tuning and filtering purposes. It is a circuit where the resonant frequency is set by adjusting the values of the components. Parallel resonance is applied in tuned tank circuits for achieving amplification, filtering, and impedance matching. Working Principle: The working principle of parallel resonance in a tuned tank circuit is based on the concept that at the resonant frequency, the impedance of the circuit is at its maximum, which allows for maximum voltage amplification and minimum current. This principle is utilized in various applications such as radio transmitters and receivers. Key Formulas: $\omega_0 = \frac{1}{\sqrt{LC}}$ — the resonant frequency of the parallel resonance circuit; $Z = \frac{R}{1 + jQ(\frac{\omega}{\omega_0} - \frac{\omega_0}{\omega})}$ — the impedance of the circuit Key Points: The resonant frequency is determined by the values of L and C; The Q-factor of the circuit determines the sharpness of the resonance peak Advantages: high voltage amplification; good selectivity Disadvantages: narrow bandwidth; sensitive to component values Applications: radio transmitters and receivers; filtering and impedance matching Additional Info: Standard Values: The values of L and C are chosen based on the desired resonant frequency and Q-factor. Wrong Options Explained: Option B (Q meter) is incorrect because it is used for measuring the Q-factor of a circuit, not for applying parallel resonance; Option C (Voltage Amplification) is a consequence of parallel resonance, not an application Answer: A is correct — the tuned tank circuit is the primary application of parallel resonance Exam Tip: To solve problems related to parallel resonance, it is essential to understand the concepts of resonance, impedance, and amplification, and to be able to apply these concepts to different types of circuits and applications.

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