A benchtop dc power supply acts as an ideal 4 A current source as long as its terminal voltage is below 10 V. Beyond this point, it begins to behave as an ideal 10 V voltage source for all load currents going down to 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.

A benchtop dc power supply acts as an ideal 4 A current source as long

1.	A benchtop dc power supply acts as an ideal 4 A current source as long as its terminal voltage is below 10 V. Beyond this point, it begins to behave as an ideal 10 V voltage source for all load currents going down to 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.
A.	Short, ∞ A, 10 V
B.	Open, 4 A, 0 V
C.	2.5 Ω, 4 A, 10 V
D.	2.5 Ω, 4 A, 5 V
Answer» D. 2.5 Ω, 4 A, 5 V