In the figure below, the resistances are R1 =0.8 Ω, R2 =2.2 Ω, and the ideal batterieshave emfs ξ 1 = 2.0 V,and ξ 2 = ξ 3 = 3 V.
(a) What is the current through each battery?(Take upward to be positive.)
battery 1                            A
battery 2 A
battery 3 A

(b) What is the potential difference Va -Vb?

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