Question

A ________ filter significantly attenuates all frequencies below $f_c$ and passes all frequencies above $f_c$ :

• A. low-pass
• B. high-pass
• C. band-pass
• D. band-low

Answer 1

The correct option is B high-pass

Low pass filter allows all frequencies below some fixed value, $f_c$

High pass filter allows all frequencies above some fixed value, $f_c$

Band pass filter allow all frequencies in certain closed range

Band low filter allows all frequencies excluding certain closed range

Therefore Band pass filter attenuates all frequencies below $f_l$ and all frequencies above $f_h$

Therefore option $B$ is correct