H refers to Hard.
(H) Assume that there are 10 nonideal 1.5-V voltage sources. Each has an internal resistance of 1.5 Ω. Those voltage sources are divided into 10/ n groups so that n voltage sources are connected in series and the 10/ n groups are connected in parallel. A 5-Ω external resistor is driven by the voltage source combination. Find the maximum current through the 5-Ω resistors and determine the value of n .