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Active Filters MCQ Questions & Answers

Active Filters MCQs : This section focuses on the "Active Filters". These Multiple Choice Questions (MCQs) should be practiced to improve the Active Filters skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.




Question 1

An electrical filter is a

A. Phase-selective circuit
B. Frequency-selective circuit
C. Filter-selective circuit
D. None of the mentioned

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Question 2

Choose the op-amp that improves the filter performance.

A. µA741
B. LM318
C. LM101A
D. MC34001

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Question 3

Determine the order of filter used, when the gain increases at the rate of 60dB/decade on the stop band.

A. Second-order low pass filter
B. Third-order High pass filter
C. First-order low pass filter
D. None of the mentioned

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Question 4

Filters are classified as

A. Analog or digital
B. Passive or active
C. Audio or radio frequency
D. All of the mentioned

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Question 5

Find out the incorrect statement about active and passive filters.

A. Gain is not attenuated in active filter
B. Passive filters are less expensive
C. Active filter does not cause loading of source
D. Passive filters are difficult to tune or adjust

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Question 6

Given the lower and higher cut-off frequency of a band-pass filter are 2.5kHz and 10kHz. Determine its bandwidth.

A. 750 Hz
B. 7500 Hz
C. 75000 Hz
D. None of the mentioned

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Question 7

Ideal response of filter takes place in

A. Pass band and stop band frequency
B. Stop band frequency
C. Pass band frequency
D. None of the mentioned

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Question 8

In which filter the output and input voltages are equal in amplitude for all frequencies?

A. All-pass filter
B. High pass filter
C. Low pass filter
D. All of the mentioned

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Question 9

Name the filter that has two stop bands?

A. Band-pass filter
B. Low pass filter
C. High pass filter
D. Band-reject filter

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Question 10

The gain of the first order low pass filter

A. Increases at the rate 20dB/decade
B. Increases at the rate 40dB/decade
C. Decreases at the rate 20dB/decade
D. Decreases at the rate 40dB/decade

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Question 11

The problem of passive filters is overcome by using

A. Analog filter
B. Active filter
C. LC filter
D. A combination of analog and digital filters

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Question 12

What are the most commonly used active filters?

A. All of the mentioned
B. Low pass and High pass filters
C. Band pass and Band reject filters
D. All-pass filters

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Question 13

What happens if inductors are used in low frequency applications?

A. Enhance inductor usage
B. No losses occurs
C. Degrades inductor performance
D. Low power dissipation

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Question 14

Which among the following has the best stop band response?

A. Butterworth filter
B. Chebyshev filter
C. Cauer filter
D. All of the mentioned

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Question 15

Which filter performs exactly the opposite to the band-pass filter?

A. Band-reject filter
B. Band-stop filter
C. Band-elimination filter
D. All of the mentioned

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Question 16

Which filter type is called a flat-flat filter?

A. Cauer filter
B. Butterworth filter
C. Chebyshev filter
D. Band-reject filter

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Question 17

Why inductors are not preferred for audio frequency?

A. Large and heavy
B. High power dissipation
C. High input impedance
D. None of the mentioned

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