In the Circuit Shown in the Figure $R _ { 1 } = 60 \Omega , R _ { 2 } = 120 \Omega , R _ { 3 } = 180 \Omega , V _ { 1 } = 3.0 \mathrm {~V} , V _ { 2 } = 6.0 \mathrm {~V}$

Multiple Choice

In the circuit shown in the figure, $R _ { 1 } = 60 \Omega , R _ { 2 } = 120 \Omega , R _ { 3 } = 180 \Omega , V _ { 1 } = 3.0 \mathrm {~V} , V _ { 2 } = 6.0 \mathrm {~V}$ , and the batteries are both ideal. What is the current through $R _ { 1 }$ ?

A) $2.68 \mathrm {~A}$
B) $0.050 \mathrm {~A}$
C) $0.00 \mathrm {~A}$
D) $0.030 \mathrm {~A}$