Which of the following combination should be selected for better tuning of an LCR circuit used for communication?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → R = 10 Ω, L = 5.0 H, C = 25 μF
To achieve better toning in an LCR circuit, one need to consider quality factor (Q) -
$Q=\frac{1}{R}\sqrt{\frac{L}{C}}$
$Q=\frac{1}{10}\sqrt{\frac{5}{25×10^{-6}}}$
Upon calculating quality factor for option 3, we deduce that it is the highest.
Hence, R = 10 Ω, L = 5.0 H, C = 25 μF