Active Filters – 1 MCQ’s

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This set of Linear Integrated Circuits Multiple Choice Questions & Answers (MCQs) focuses on “Active Filters – 1″.

1. Filters are classified as
a) Analog or digital
b) Passive or active
c) Audio or radio frequency
d) All of the mentioned

2. 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

3. An electrical filter is a
a) Phase-selective circuit
b) Frequency-selective circuit
c) Filter-selective circuit
d) None of the mentioned

4. 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

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

6. Choose the op-amp that improves the filter performance.
a) µA741
b) LM318
c) LM101A
d) MC34001

7. 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

8. 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

9. 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

10. Find out the low pass filter from the given frequency response characteristics.
a)
Find the low pass filter from the given diagram
b)
Find the constant gain from 0Hz from the given diagram
c)
Find the high cut-off frequency fH from the given diagram
d)
Find the pass band frequency from the given diagram

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