A BJT is baised in forward active mode Assume V_BE = 0.7 V, kT/q = 25 mV and reverse saturation current I_s = 10^-13A. The transconductance of the BJT (in mA/V) is

A good current buffer has

In the low - pass filter shown in the figure, for a cut - off frequency of 5 KHz, the value of R₂ (in k$$\Omega $$ ) is _________

In the ac equivalent circuit shown in the figure, if i$${_F}$$ is very large, the type of feedback is