Question

18. In case of high pass filter when the frequency of input signal is less than the cutoff frequency,
then gain
a) decreases
b) increases
c) remains constant
d) get double​

Answer 1

Answer:

I think 2 is the right...........................

.

Answer 2

Answer:

The correct answer is option B

Explanation:

• Filter is a circuit which allows only a particular band of frequencies to pass through it and rejects or attenuates the rest of frequencies.
• Filters are classified based on the band of frequencies which they allow to pass or attenuate through them .
• They are 1.high pass, 2.low pass ,3.bandpass and 4.band stop filters
• Coming to your question, a low pass filter allows frequencies less than a particular lower cut off frequency (designed according to the application) to pass through it .These are typically used in elimination of noise (since the frequency of noise is high ).
• On the other side , a high pass filter allows frequencies higher than a particular lower cut off frequency .
• High pass filters are used to direct high frequency audio signals .
• As with low-pass filters, high-pass filters have a rated cutoff frequency, above which the output voltage increases above 70.7% of the input voltage.

Reference Link

• https://brainly.in/question/5199082
• https://brainly.in/question/17394337