# 23 Analog Filter Interview Questions (For Beginner’s !)

Analog Filter related selected MCQ Questions has been discussed in this article particularly for Core Technical Round Electronics domain interview. This is useful for different competitive and Semester Exam.

## Q. The input-terminals of an op-amp are termed as

1. High & low terminals
2. Differential & non-differential terminals
3. Inverting and non-inverting terminals
4. Positive & negative terminals

## Q. In a series resonance circuit, to obtain a LPF character, across which, output voltage should be measured?

1. Inductive element
2. Resistive element
3. Capacitive element
4. All of these

## Q. In a series resonance circuit, to get a high-pass filter character, across which, output voltage should be measured?

1. Resistive element
2. Inductive element
3. Capacitive element
4. All of these

## Q.A high pass filter is mainly

1. A differentiator circuit with low time constant.
2. A differentiator circuit with 0.75 time constant.
3. An integrator circuit with small time constant.
4. An integrator circuit with 0.50 time constant.

1. RCs/1+RCs
2. 1/1+RCs
3. RC/1+RCs
4. s/1+RCs

1. e-t/RC
2. et/RC
3. 1
4. 1-e-t/RC

## Q.In low-pass filter, at which frequency the highest point of the graph occurs?

• At f resonant
• Below f resonant
• Above f resonant
• At any frequency

## Q.The transfer function V2(s)/V1(s)=10s/x2+10s+100 is for an active

1. Low-pass filter
2. Band-pass filter
3. High-pass filter
4. All-pass filter

1. LPF
2. HPF
3. BPF
4. BSF

1. LPF
2. HPF
3. BPF
4. BSF

1. True
2. False

1. True
2. False

1. True
2. False

## Q.Active filters are usually fabricated by

1. L circuits
2. RL circuits
3. RLC circuits
4. Op-amp circuits

## Q.What are the most used active filters?

1. Low-pass filters & high-pass filters
2. Band-pass filters and band-reject filters
3. All-pass filters
4. Correct option is not present

## Q.Ideal response of a analog filter occurs in

1. Pass-band and stop-band freq.
2. Stop-band freq. only
3. Pass-band freq.
4. None of the above

## Q.Inductors are not preferred for audio frequency because of

1. Large size and bulky as per weight
2. Low input impedance
3. High power intemperance
4. None of the above

## Q. analog filters are classified as

1. Active & passive filter
2. Analog & digital filter
4. All of the above

## Q.Which analog filter has two stop bands?

1. Band-pass filter
2. Low-pass filter
3. All-pass filter
4. Butterworth filter

## Q.Which analog filter is called flat-flat filter?

1. Chebyshev filter
2. All pass filter
3. Butterworth filter
4. None of the above

## Q.Which one demonstrate a linear phase analog filter characteristic?

1. Bessel
2. Chebyshev
3. Butterworth
4. All of the above

## Q.All pass is also known as

1. Phase shift filter
2. Time delay filter
3. Delay equalizer
4. All of the above

## Q. An op-amp has

1. An infinite voltage gain
2. Unity voltage gain
3. Zero voltage gain
4. None of the above