Chapter 18 - Problems - Page 700: 40

(a) $emf = 3.0~V$ (b) $I = 0.94~A$

(a) We can find the equivalent $emf$: $emf = 3.0~V+4.5~V-1.5~V+2.0~V-5.0~V$ $emf = 3.0~V$ (b) We can find the current: $emf = I~R$ $I = \frac{emf}{R}$ $I = \frac{3.0~V}{3.2~\Omega}$ $I = 0.94~A$