a$.$ Using the characteristics of Fig. $3\mathrm{.}8,$ determine the resulting collector current if $I_E=3\mathrm{.}5mA$ and $V_{CB}=10V.$

b$.$ Repeat part $($a$)$ for $I_E=3\mathrm{.}5mA$ and $V_{CB}=20V.$

c$.$ How have the changes in $V_{CB}$ affected the resulting level of $I_C?$

d$.$ On an approximate basis, how are $I_E$ and $I_C$ related based on the results above?

FIG. $3\mathrm{.}8$

Output or collector characteristics for a common$-$base transistor amplifier.