11. A band pass filter is one which :
(a) attenuates frequencies between two designated cut-off frequencies and passes all other frequencies
(b) passes frequencies between two designated cut-off frequencies, and attenuates all other frequencies
(c) passes all frequencies
(d) none of these
12. An ideal filter is one which :
(a) zero attenuates in the pass band
(b) infinite attenuation in the pass band
(c) zero attenuation in the attenuation band
(d) none of these
13. In the m-derived low pass filters, the resonant frequency is to be chosen so that is :
(a) above the cut-off frequency
(b) below the cut-off frequency
(c) none of the above
(d) none of these
14. In the m-derived high pass filters, the resonant frequency is to be chosen so that is :
(a) above the cut-off frequency
(b) below the cut-off frequency
(c) none of the above
(d) none of these
15. A band elimination filter is one :
(a) which attenuates all frequencies less than lower cut-off frequency f1
(b) which attenuates all frequencies greater than upper cut-off frequency f2
(c) frequencies lying between f1 andf2 are attenuated and all other frequencies are passed
(d) none of these
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