A BJT is said to be operating in the saturation region if

The Ebers-Moll model is applicable to

The Early-Effect in a bipolar junction transistor is caused by

By reversing the order of integration $$\int\limits_0^2 {\int\limits_{{x^2}}^{2x} {f\left( {x,y} \right)dy\,dx} } $$ may be represented as ______.