Which of the following combinations should be selected for better turning of an LCR circuit used for communication ?

Options

A. `R = 20 Omega, L = 1.5 H, C = 35 mu F`
B. `R = 25 Omega, L = 2.5 H, C = 45 mu F`
C. `R = 15 Omega, L = 3.5 H, C = 30 mu F`
D. `R = 25 Omega, L = 1.5 H, C = 45 mu F`

Answer

3

Explanation

For better tunning of an `LCR` circuit used for communication the circuit should posses high quality factor of resonacne.
i.e., `Q (1)/(R ) sqrt((L)/(C ))` should be high.
For it `R` should be low, `L` should be high and `C` should be low, therefore comination in option (c ) is correct.