Electrical Engineering - RLC Circuits and Resonance - Discussion
Discussion Forum : RLC Circuits and Resonance - General Questions (Q.No. 11)
11.
If the resistance in parallel with a parallel resonant circuit is reduced, the bandwidth
Discussion:
16 comments Page 1 of 2.
Akanksha said:
10 years ago
BW = 1/RC.
R is decreasing. So BW will increase.
R is decreasing. So BW will increase.
(2)
Imran said:
1 decade ago
For parallel arrangement of RLC, BW = 1/RC. R decreases, BW increases.
(1)
Shashikant said:
6 years ago
In parallel RLC circuit q=r""L/c.
So when r decreases q decreases.and b.w= resonant frequency/q factor.
So if q decreases then bandwidth must increase. Make high r-value get power loss to have high q in the circuit.
So when r decreases q decreases.and b.w= resonant frequency/q factor.
So if q decreases then bandwidth must increase. Make high r-value get power loss to have high q in the circuit.
(1)
Jeya said:
1 decade ago
Bandwidth = fr/Q --- eqn1.
fr = resonance frequency, Q=Quality factor.
fr = 1/2*pi*sqrt(LC).
Q = 1/(R*sqrt(LC).
If R decreases, Q increases from eqn1 Q increases, bandwidth decreases.
fr = resonance frequency, Q=Quality factor.
fr = 1/2*pi*sqrt(LC).
Q = 1/(R*sqrt(LC).
If R decreases, Q increases from eqn1 Q increases, bandwidth decreases.
Arun said:
1 decade ago
Q = R*sqrt(C/L) for Parallel RLC.
Vasiq said:
1 decade ago
I don't think this is right. According to wikipedia, the Q factor of a parallel RLC circuit is: R*sqrt(C/L). This implies that decreasing the resistance would decrease the Q factor. And since, Q factor and bandwidth are inversely proportional, the bandwidth would increase!
Gopal said:
1 decade ago
I am also having same perception with @Vasiq, also Q factor is the ratio of resistance to inductive reactance. If resistance increases then Q factor also increase & consequently Band width decreases as both inversely proportional to each other.
SUBHAJIT RAY said:
1 decade ago
Q = x/R when R decrease Q increase. And bandwidth inversely proportional to Q factor. That means bandwidth increase.
Suneeth Raj said:
1 decade ago
BW=R/2pifL as resistance decrease band width decreases.
Shashi kant said:
9 years ago
We know for parallel resonance circuit Q = wRC or = R/wL. So R increases Q increases.
B.W = f. r/Q than bandwidth decreases.
B.W = f. r/Q than bandwidth decreases.
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