Advanced Problems on Filters – 2 MCQ’s

This set of Network Theory Multiple Choice Questions & Answers (MCQs) focuses on “Advanced Problems on Filters – 2″.

1. In the circuit given below, a dc circuit fed by a current source. With respect to terminals AB, Thevenin’s voltage and Thevenin’s resistance are ____________

a) V_TH = 5 V, R_TH = 0.75 Ω
b) V_TH = 7.14 V, R_TH = 2.14 Ω
c) V_TH = 7.5 V, R_TH = 2.5 Ω
d) V_TH = 5 V, R_TH = 1 Ω

2. In the circuit given below, the value of R is ____________

a) 12 Ω
b) 6 Ω
c) 3 Ω
d) 1.5 Ω

3. In a parallel RL circuit, 10 A current enters into the resistor R and 15 A current enters into the Inductor L. The total current I is _____________
a) 15.5 A
b) 25.05 A
c) 18.03 A
d) 30.15 A

4. In the circuit given below, M = 1. The resonant frequency is _______________

a) 145.3 Hz
b) 0.1453 Hz
c) 1.453 Hz
d) 14.53 Hz

5. Two network functions are given below.
H₁ = 1s2+2s+1, H₂ = 1s3+3s2+3s+1
The frequency response indicates that the filter is ___________
a) Low-pass
b) Band-pass
c) High-pass
d) Band reject

6. The filter which passes all frequencies above fc by attenuating significantly, all frequencies above f_c is _______________
a) Low-pass
b) High-pass
c) Band-pass
d) Band-stop

7. A thermistor is used for ____________
a) Over voltage protection
b) Temperature alarm circuit
c) Automatic light control
d) Automatic sensor

8. A particular band-pass function has a network function as H(s) = ss2+2s+1 then, its quality factor Q is ___________
a) 34
b) 12
c) 32
d) 14

9. For a Band Pass Filter, the slope of the filter is given as 80dB/decade. The order of the Band Pass Filter is __________
a) 10
b) 8
c) 4
d) 6

11. For providing a Roll-off greater than 60dB/decade/pole, filters with which characteristics are useful?
a) Butterworth
b) Chebyshev
c) Bessel
d) Butterworth & Bessel

10. In which of the filter circuits given below, will the bandwidth be equal to the critical frequency?
a) Low-pass
b) High-pass
c) Band-pass
d) Band-stop

13. Given a system function H(s) = 1s+10. Let us consider a signal sin 10t. Then the steady state response is ___________
a) 1
b) 2
c) 0
d) 5

12. A Low-pass filter circuit has a cut-off frequency of 50 kHz. The bandwidth of the filter is ______________
a) 24.6 kHz
b) 50 kHz
c) 61.5 kHz
d) 36.9 kHz

14. Current I = – 1 + 2–√ (sin (ωt + 60°)) A is passed through three meters. The respective readings will be?
a) 2–√ A, 2–√ A and 1 A
b) 1 A, 2–√ A and 1 A
c) – 1 A, 2–√ A and 2–√ A
d) -1 A, 1 A and 1 A

15. For a Band Pass Filter, the slope of the filter is given as 40dB/decade. The order of the Band Pass Filter is __________
a) 2
b) 3
c) 4
d) 6