8) The minimum value of input coupling capacitor for 20 Hz to 20 kHz amplifier should be atleast ?

9) In a CE amplifier, the voltage gain of the circuit is reduced to _____ times of its maximum value (mid frequency) value at the cut-off frequency.

10) The gain (voltage or current) of a CE amplifier is highest at ?

11) In a three stage cascade amplifier, if the gain of first stage is 50, of second stage is 10 and of third stage is 5, then what is the overall gain ?

12) Which one of the following points is true in case of direct coupled amplifiers ?