The reading of the ammeter for a silicon diode in the given circuit is :

Truth table for the following digital circuit will be :

In a common emitter configuration with suitable bias, it is given that $${R_L}$$ is the load resistance and $${R_{BE}}$$ is small signal dynamic resistance (input side). Then, voltage gain, current gain and power gain are given, respectively, by :

$$\beta $$ is curret gain, $${{\rm I}_B},{{\rm I}_C}$$ and $${{\rm I}_E}$$ are respectively base, collector and emitter currents.

The current gain of a common emitter amplifier is 69. If the emitter current is 7.0 mA, collector current is :