For the Circuit Shown in the Figure $R _ { 1 } = 50 \Omega , R _ { 2 } = 20 \Omega , R _ { 3 } = 35 \Omega , R _ { 4 } = 10 \Omega , R _ { 5 } = 68 \Omega$

Short Answer

For the circuit shown in the figure, $R _ { 1 } = 50 \Omega , R _ { 2 } = 20 \Omega , R _ { 3 } = 35 \Omega , R _ { 4 } = 10 \Omega , R _ { 5 } = 68 \Omega$ , $I _ { 1 } = 0.111 \mathrm {~A} , I _ { 2 } = 0.142 \mathrm {~A}$ , and the batteries are ideal.
(a) Determine $V _ { 1 }$ and $V _ { 2 }$ .
(b) What is the potential difference across $R _ { 4 }$ ?