Assume that the $$N$$-channel $$MOSFET$$ shown in figure is ideal, and that its threshold voltage is The voltage $${\rm I}V,$$ the voltage $${{V_{ab}}}$$ between nodes $$'a'$$ and $$'b'$$ is

Two perfectly matched silicon transistors are connected as shown in figure. The value of the current $${\rm I}$$ is

A bipolar junction transistor (BJT) is used as a power control switch by biasing it in the cutoff region (OFF state) or in the saturation region (ON state). In the ON state, for the BJT

In the circuit of figure shown, assume that the transistor has $${h_{fe}} = 99$$ and $${V_{BE}} = 0.7V.$$
The value of collector current $${{\rm I}_C}$$ of the transistor is approximately