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If F1 and F2 are the lower and upper cutoff frequencies of a band pass signal, then what is the condition to be satisfied to call such a band pass signal as narrow band signal?

Correct Answer: (F1-F2)⋘\(\frac{F_1+F_2}{2}\)(factor of 10 or more)
If the difference in the cutoff frequencies is much less than the mean frequency, the such a band pass signal is known as narrow band signal.

Consider an open loop circuit with lower cutoff frequency 5kHz and upper cutoff frequency 20kHz. If negative feedback is applied to the same, choose correct option stating the new cutoff frequencies.

A band-pass filter rejects all frequencies within a band between a lower and an upper critical frequency and passes all others.

The cutoff frequency of the low pass Butterworth filter is the arithmetic mean of the two cutoff frequencies as found above.

A band-stop filter passes frequencies between its lower and upper critical frequencies and rejects all others.

Consider an AM broadcast station that transmits modulating frequencies up to 10kHz. If it transmits a frequency of 1000 kHz. Find its maximum and minimum upper and lower sidebands frequencies and also the total bandwidth?

Is the following statement true? Statement: On the basis of band theory of solids the semi-conductors have a completely filled valence band, a partially filled conduction band and a narrow forbidden band.

The lower and upper cut off frequencies are also called ___________ frequencies

The low pass, high pass, band pass and band stop filters can be designed by applying a specific transformation to a normalized low pass filter.

Which of the following best explain why the lower course of a river is sometimes choked with sediments?
1. The valley of a river is widest in its lower course.
2. The velocity of a river in its lower course is low.
3. The delta sometimes develops in a river's lower course.
4. Much of the river water is drawn for irrigation in the lower course.

What is the region between stop band and the pass band frequencies in the magnitude frequency response of a low pass filter?