An electrical filter is a

• Phase-selective circuit

• Frequency-selective circuit

• Filter-selective circuit

• None of the mentioned

Filters are classified as

• Analog or digital

• Passive or active

• Audio or radio frequency

• All of the mentioned

Why inductors are not preferred for audio frequency?

• Large and heavy

• High power dissipation

• High input impedance

• None of the mentioned

The problem of passive filters is overcome by using

• Analog filter

• Active filter

• LC filter

• A combination of analog and digital filters

Find out the incorrect statement about active and passive filters.

• Gain is not attenuated in active filter

• Passive filters are less expensive

• Active filter does not cause loading of source

• Passive filters are difficult to tune or adjust

What are the most commonly used active filters?

• All of the mentioned

• Low pass and High pass filters

• Band pass and Band reject filters

• All-pass filters

Ideal response of filter takes place in

• Pass band and stop band frequency

• Stop band frequency

• Pass band frequency

• None of the mentioned

Find out the low pass filter from the given frequency response characteristics.

• 
• 
• 
• 

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

• Band-reject filter

• Band-stop filter

• Band-elimination filter

• All of the mentioned

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

• 750 Hz

• 7500 Hz

• 75000 Hz

• None of the mentioned