A benchtop dc power supply acts as an ideal $\text{4 A}$ current source as long as its

terminal voltage is below $\text{10 V}$. Beyond this point, it begins to behave as an ideal

$\text{10 V}$ voltage source for all load currents going down to $\text{0 A}$. When connected to

an ideal rheostat, find the load resistance value at which maximum power is

transferred, and the corresponding load voltage and current.

1. $\text{Short,$\infty$A, 10 V}$
2. $\text{Open, 4 A, 0 V}$
3. $\text{2.5$\Omega$, 4 A, 10 V}$
4. $\text{2.5$\Omega$, 4 A , 5 V}$
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