NEET-XII-Physics
exam-2 year:2016
- #97Which of the following combinations should be
selected for better tuning of an L-C-R circuit used
for communication ?
(1) R = 15 ``\Omega``, L = 3.5 H, C = 30 ``\mu``F
(2) R = 25 ``\Omega``, L = 1.5 H, C = 45 ``\mu``F
(3) R = 20 ``\Omega``, L = 1.5 H, C = 35 ``\mu``F
(4) R = 25 ``\Omega``, L = 2.5 H, C = 45 ``\mu``FdigAnsr: 1Ans : (1)
Sol. For better tuning, Q-factor must be high.
∴
= o
L
Q
R
1 L
RLC
=
1 L
R C
=
R and C should be small and L should be high.