For what range of $$K$$ is the following system (Figure) asymptotically stable Assume $$K \ge 0$$

For what values of $$'a'$$ does the system shown in figure have a zero steady state error $$\left[ {i.e.,\mathop {Lim}\limits_{t \to \infty } \,\,E\left( t \right)} \right]$$ for a step input?

If the $$HLT$$ instruction of a $$8085$$ microprocessor is executed,

The equivalent inductance seen at terminals $$A-B$$ in Fig. is .................... $$H.$$