Chapter 2, Problem 43P

Devise a switch arrangement where by two voltage sources ${\text{V}}_{\text{S1}}$ and ${\text{V}}_{\text{S2}}$ can be connected simultaneously to either of two resistors ${\text{(R}}_{\text{1}}\text{ and }{R}_2)$ as follows: ${\text{V}}_{\text{S1}}$ connected to ${\text{R}}_{\text{1}}$ and ${\text{V}}_{\text{S2}}$ connected to ${\text{R}}_{\text{2}}$

${\text{V}}_{\text{S1}}$ connected to ${\text{R}}_{\text{2}}$ and ${\text{V}}_{\text{S2}}$ connected to ${\text{R}}_{\text{1}}$