Electrical Engineering - Passive Filters - Discussion

Discussion Forum : Passive Filters - General Questions (Q.No. 1)
1.
In a certain parallel resonant band-pass filter, the resonant frequency is 14 kHz. If the bandwidth is 4 kHz, the lower frequency
is 7 kHz
is 10 kHz
is 12 kHz
cannot be determined
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
11 comments Page 1 of 2.

Fij said:   2 years ago
Very Clear explanation. Thanks @Sanjeev Sing.
(1)

Lakshmi Apoorva said:   5 years ago
Thanks for explaining Everyone.

Pavan kumar said:   6 years ago
Low pass 14-4/2 = 12kHz.
(1)

Veeresh said:   6 years ago
Thanks for solving this clearly @Sanjeev sing.

Karthik.MG said:   7 years ago
14-4/2= 12 how?

Please explain me.
(1)

Giridhar k said:   9 years ago
Resonant frequency = G.M(geometric mean) of f1 & f2.
fr = root of (f1 & f2).

For High quality factor circuits Q >> 5, ckts approximately A.M of f1 & f2. fr = 0.5(f1 + f2).

Rauf said:   9 years ago
It's very good to know and improve the electrical knowledge. Thank you.

Chinna said:   1 decade ago
B.W = f2-f1 = 4hz.

fr^2 = f1*f2 = 196.

By solving above eq...f1 = 12hz.

Sanjeev singh said:   1 decade ago
The resonant frequency is 14 kHz.

Band Width is 4 KHz.

High frequency = resonant frequency+B.w/2, So Hf = 14+4/2 = 16.

Lower frequency = resonant frequency-B.w/2, So Lf = 14-4/2 = 12.

Answer C.
(9)

ASHOK said:   1 decade ago
The resonant frequency is 14 kHz.
Band Width is 4 KHz then multiply the band width with 4.
4KHz * 4= 16KHz.
High frequency is below the 4KHz and Low Frequency is Near the 16KHz then the resultant Low Frequency is 12KHz.


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