Mechanical Engineering Exam > Mechanical Engineering Questions > Q-factor of a parallel tuned circuit can be i...
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Q-factor of a parallel tuned circuit can be increased by
- a)increasing circuit resistance
- b)decreasing circuit resistance
- c)decreasing inductance of the circuit
- d)none of these
Correct answer is option 'B'. Can you explain this answer?
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Q-factor of a parallel tuned circuit can be increased bya)increasing c...
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Q-factor of a parallel tuned circuit can be increased bya)increasing c...
Increasing Q-factor of a parallel tuned circuit:
Increasing the Q-factor of a parallel tuned circuit is essential for improving the selectivity and efficiency of the circuit. One way to achieve this is by decreasing the circuit resistance.
Decreasing circuit resistance:
- The Q-factor of a parallel tuned circuit is given by the formula Q = ω0L/R, where ω0 is the resonant frequency, L is the inductance, and R is the resistance.
- By decreasing the circuit resistance R, the Q-factor of the circuit increases, leading to improved selectivity and efficiency.
- A lower resistance means less energy is dissipated in the circuit, resulting in a higher Q-factor.
Impact of other factors:
- Increasing circuit resistance would actually decrease the Q-factor, as it would increase the energy losses in the circuit.
- Decreasing inductance of the circuit may impact the resonant frequency and overall performance of the circuit, but it is not directly related to increasing the Q-factor.
Therefore, to increase the Q-factor of a parallel tuned circuit, the most effective approach is to decrease the circuit resistance. This will help in achieving better selectivity and efficiency in the circuit.
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Q-factor of a parallel tuned circuit can be increased bya)increasing circuit resistanceb)decreasing circuit resistancec)decreasing inductance of the circuitd)none of theseCorrect answer is option 'B'. Can you explain this answer?
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