$6\mathrm{.}11$ A series RL circuit with a nonlinear inductor is shown in Fig. P$6\mathrm{.}11.$ Recall that the following nonlinear function for inductor current was Ased in Problem $3\mathrm{.}14$ in Chapter $3$:

$I_L()=97\mathrm{.}3{}^3+4\mathrm{.}2,(amps,A)$

where $$ is the flux linkage. Use Simulink to obtain the dynamic response for current $I_L(t)$ if the source voltage is a $4-V$ step function, that is$,e_{in}(t)=4U(t)V.$ The RL circuit has zero energy stored at time $t=0$ and the resistance is $R=1\mathrm{.}2.$ Plot current $I_L$ versus time.

Nonlinear indistor