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Question

https://session.masteringphysics.com/problemAsset/1924756/4/Mazur1e.ch31.p72.jpg Question In (Figure 1) , E1 = 5.0 V, E2 = 5.0 V, E3 = 1.5 V,R1 = 40 , R2 = 40 , R3 = 40 . Part A What is the current in the branch fabc? Express your answer with the appropriate units. Enter positive value if the current flows in the direction fabc and negative value if the current flows in the direction cbaf. Part B What is the current in the branch cf? Express your answer with the appropriate units. Enter positive value if the current flows in the direction cf and negative value if the current flows in the direction fc. Part C What is the current in the branch cdef? Express your answer with the appropriate units. Enter positive value if the current flows in the direction cdef and negative value if the current flows in the direction fedc. Part D What is the potential difference Vab? Express your answer with the appropriate units. Part E What is the potential difference Vbc? Express your answer with the appropriate units. Part F What is the potential difference Vcd? Express your answer with the appropriate units. Part G What is the potential difference Vde? Express your answer with the appropriate units. Part H What is the potential difference Vef? Express your answer with the appropriate units. Part I What is the potential difference Vfa?

Explanation / Answer

branch fabc, current = i
E1 = R1i + R3i
i = 5/(40+40) = 0.0625

branch efcd
R1I + E2 - E3 + R2I = 0
40I + 5 - 1.5 + 40I = 0
I = -0.04375

A. i = 0.0625 A
B. i - I = 0.10625 A
C. I = -0.04375 A
D. 5V
E. 0V
F. 0V
G. 3.5 V
H. V = 0.04375*40 = 0.875 V
I. 0.0625*40 = 2.5 V

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