Froblem $4$: $(8$ Points$)-$

aV$\_($mi$)=$V$\_($ma $)$ and M$(3)/($M$)4$ to be identical, and

$\backslash$lambda $=0.$

b$($L$)/($W$)$

w and $(($L$)/($W$))$Na$=$N$^(*)(($L$)/($W$))$ H$\_($s$)$ is hept the same in

the two circuits, what value of N leads to a $9$ x increase in output

current in the second circuit? $\{3$ pts$.)$

Fegure $4$