20 mA
ALPHA (?):?It is a large signal current gain in common base configuration. It is the ratio of collector current (output current) to the emitter current (input current).It is a current gain in CB amplifier and it indicates that the amount of emitter current reaching to collector. Its value is unity ideally and practically less than unity. Beta (?): It is a current gain factor in the common emitter configuration. It is the ration of collector current (output current) to base current (output current).
a pulsating unidirectional voltage
The output from a full wave rectifier is a pulsating unidirectional voltage
50
equal to the frequency
copper decreases and that of germanium increases
A piece of copper and another of germanium are cooled from room temperature to 80 K. The resistance of copper decreases and that of germanium increases
more than dc value
In a half-wave rectifier, the rms value of the ac component of the wave is more than dc value