Engine 2014: Electricity

1. A Low frequencies below the lower cutoff- frequency are passed and high frequencies above the upper cut-off frequency are attenuated.
2. B Low frequencies below the lower cutoff- frequency are attenuated and high frequencies above the upper cut-off frequency are passed.
3. C Low frequencies below the lower cutoff- frequency are attenuated and high frequencies above the upper cut-off frequency are attenuated.
4. D Low frequencies below the lower cutoff- frequency are passed and high frequencies above the upper cut-off frequency are passed.

Tip: press A-D to answer